A guide to protecting your home's greenery from the cold: covering techniques, targeted irrigation, and preventative care for a lush garden even in spring by Marco Arezio With the arrival of autumn, the garden changes. The days get shorter, temperatures drop, and the rhythm of nature slows, preparing for what is the most difficult season for plants: winter. It's often thought that in the cold, the garden doesn't require special care, but in reality, it's precisely at this time that the foundations for spring's rebirth are laid. Preparing your garden for winter doesn't just mean protecting your plants from frost, but also taking care of your lawn, nourishing the soil, and making small adjustments that will make a difference when the good weather returns. A garden cared for in autumn faces winter with greater resilience and, in spring, yields more abundant blooms, a greener lawn, and more robust plants. Preparation is therefore a true form of prevention, combining technique with patience, but also the joy of experiencing gardening in a slower, more meditative way. Preparing your garden for winter: importance and benefits Winter brings extreme conditions for plants: sudden frosts, sudden temperature swings between day and night, icy winds that dry out branches, and waterlogged soil that can damage roots. A garden left unattended during this season risks damage that's difficult to repair. However, good preparation ensures plants have a safe vegetative rest, minimizing the risk of disease and facilitating a spring recovery. In addition to providing protection from the cold, this period also provides an opportunity to prepare the soil, improve its structure with targeted fertilization, and plan any future interventions. It is therefore a strategic time that every gardening enthusiast should carefully consider. Protecting plants from frost and bad weather Not all plants are equally cold-resistant. Some Mediterranean species, such as citrus fruits, young olive trees, and delicate aromatic plants (basil, rosemary, potted bay leaves), require more careful protection than hardy species like bay leaves or hornbeams. To shield them, you can use non-woven fabric sheets, which insulate from the cold but allow the plant to breathe, preventing the formation of harmful condensation. Hedges and shrubs can be protected with straw or reed mats, while young trees require trunk wrapping to protect the bark from cracking caused by frost. In particularly cold regions, even a small garden greenhouse or a temporary structure made of clear plastic can provide effective protection, creating a more favorable microclimate. How to protect potted plants in winter Potted plants are particularly vulnerable because their roots have less protection than those in the ground. In cold climates, it's best to move pots to sheltered areas, such as verandas, loggias, or near south-facing walls that retain heat. Containers can be wrapped in insulating materials (bubble wrap, jute, coconut matting) and raised off the ground using feet or wooden planks, avoiding direct contact with the frozen ground. A simple trick is to group pots together so they protect each other from the wind, reducing heat loss. Potted evergreens, such as camellias or rhododendrons, also require light but consistent watering to avoid water stress during the colder months. Lawn maintenance and care in the cold months The lawn also requires specific attention. Before winter arrives, a final cut is recommended, maintaining a moderate height: neither too short, to avoid weakening the roots, nor too high, to prevent the grass from rotting due to moisture. It's equally important to remove dead leaves and plant debris, which, if left on the ground, can suffocate the grass and encourage moss growth. In larger lawns, it's also a good idea to lightly aerate the soil, which helps prevent waterlogging and ensures oxygen circulation. During the winter months, lawns tend to slow down in growth, but well-maintained soil won't suffer and will be ready to re-grow with the first warm spring days. Fall irrigation and water management in the garden Water is essential, but it must be managed carefully. In autumn, before the frost, it's helpful to provide abundant, deep watering, allowing plants to accumulate water reserves. Afterward, watering should be reduced, as it risks creating stagnant water that, when frost hits, becomes deadly for the roots. A practical tip is to empty pipes and automatic irrigation systems before the intense cold weather arrives, to prevent residual water from freezing and causing damage to the structures. Those with fountains or small ornamental ponds can use pumps to keep the water moving, reducing the risk of surface ice. Mulching techniques to protect roots and soil Mulching is perhaps the simplest and most effective way to protect your garden in winter. Spreading a layer of bark, dry leaves, pine needles, or straw over the soil keeps the soil warmer and maintains a constant temperature, preventing frost damage and temperature fluctuations. Mulching, in addition to insulating the roots, reduces evaporation and limits weed growth. Furthermore, over time, organic materials decompose, enriching the soil with organic matter, creating a virtuous cycle of natural nutrients. It is an approach that combines effectiveness and sustainability, perfectly in line with "slow life" garden management. Fertilizing your lawn and plants before winter A well-nourished garden better weathers the rigors of winter. In autumn, it's advisable to apply fertilizers rich in potassium and phosphorus, which strengthen roots and improve resistance to low temperatures. Nitrogen, on the other hand, should be reduced, as it stimulates leaf growth that would otherwise be difficult to withstand frost. For lawns, a slow-release fertilizer is helpful. Spread it in October or November and it will support the roots throughout the cold season. Shrubs and hedges also benefit from targeted nutrition, which minimizes winter stress and ensures a vigorous recovery. Common mistakes to avoid when winterizing your garden Overprotecting plants can be counterproductive: excessive covering without transpiration encourages the formation of mold and rot. Equally risky is neglecting to keep the garden clean: fallen branches and accumulated leaves are a breeding ground for fungal diseases. A common mistake also concerns potted plants: many enthusiasts stop watering them completely in winter, but some species, especially evergreens, still require minimal watering. Finally, generalizations are wrong: each plant has its own needs. Knowing the characteristics of the species in your garden is the first rule for properly protecting them. Conclusion Preparing your garden for winter isn't just a series of technical tasks: it's a ritual that allows you to tune into the rhythm of nature. It means observing your plants, listening to their needs, protecting the most fragile and strengthening the most resistant. It's a time of care, but also of contemplation: as you spread mulch or wrap pots, you build a bridge between the seasons, ensuring that spring arrives richer in life and color. A well-prepared garden promises a thriving future. Therefore, protecting your plants and lawn in winter is not just a necessity, but a loving gesture toward your green space. © Reproduction Prohibited
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Discover how new bio-based materials are revolutionizing the design of temporary electronic devices, offering truly sustainable solutions to reduce tech waste by Marco Arezio In the rapidly evolving landscape of sustainable technology, biodegradable organic electronics is carving out a leading role. We're increasingly hearing about electronic circuits designed to have a limited "useful life," intended for temporary or disposable applications. The real innovation isn't just their function, but also their materials: these devices are made using bio-based components that degrade naturally at the end of their life cycle, leaving no harmful traces in the environment. This article explores in a technical and detailed way the revolution brought by biodegradable organic materials in electronics , analyzing the available technologies, emerging applications and open challenges. The e-waste crisis and the response of biodegradable materials E-waste, or electronic waste, is currently one of the major global environmental emergencies. According to United Nations data, tens of millions of tons of electronic waste are generated every year, only a fraction of which is properly recycled. The remainder ends up in landfills or is improperly disposed of, releasing toxic substances and heavy metals into the environment. Biodegradable electronics fits into this context: a line of research that aims to revolutionize the production chain and life cycle of electronic devices, offering a concrete solution to the problem of waste accumulation. Unlike traditional electronics, new organic circuits are designed to dissolve or decompose safely, thus eliminating the problem of disposal. What is meant by biodegradable organic electronics? Organic electronics is an interdisciplinary field that combines materials chemistry, electronic engineering, and biotechnology. The core of this research is the development of polymeric materials or organic compounds that can conduct electricity while also being completely biodegradable. The main materials used include: - Biodegradable conductive polymers: such as polyaniline, modified PEDOT:PSS, or polypyrrole, often derived from renewable or plant sources and capable of degrading under controlled environmental conditions. - Bio-based substrates: paper, cellulose, gelatin, starch, chitosan, milk or silk proteins, used to replace traditional plastic substrates. - Organic electronic inks: obtained by mixing biodegradable conductive materials with natural solvents, for printing circuits using techniques such as inkjet printing or screen printing. These components are combined to create devices that maintain adequate performance during use, but which, once their task is complete, can be thrown away with organic waste or composted, degrading much faster than traditional devices. Main applications of biodegradable electronics The possibilities offered by biodegradable organic electronics are numerous and constantly expanding. Among the most interesting applications: a. Temporary medical devices A pioneering field is that of implantable or wearable medical devices, such as sensors, vital signs monitoring patches, diagnostic microchips, and controlled drug delivery systems. These devices can be designed to function for a defined period of time, then dissolve into the body without the need for surgical removal. b. Disposable environmental sensors Precision agriculture, water monitoring, or air quality measurement can benefit from temporary sensors, distributed widely and then allowed to degrade naturally, avoiding the accumulation of microplastics or waste. c. Intelligent packaging and traceability RFID labels, NFC tags, or freshness indicators integrated into food, pharmaceutical, or other packaging can be made fully compostable, seamlessly integrating into organic waste streams. d. Electronics for education and entertainment Disposable educational circuits, temporary interactive toys, promotional gadgets, or event components can be developed while drastically reducing their environmental impact, thanks to the use of biodegradable materials. The technical challenges and limitations still to be overcome Despite recent progress, biodegradable electronics still presents some significant technical challenges: Performance and durability: Organic materials, despite having improved their properties, still offer inferior performance compared to traditional semiconductors (such as silicon or GaAs), especially in terms of electronic mobility, stability over time and resistance to environmental conditions. Biodegradation Control: It is essential that the degradation process is predictable and controllable, so as to ensure the functionality of the device for the necessary period and its subsequent complete disintegration, without toxic residues. Industrial compatibility: Many production lines are designed for conventional materials; therefore, it is necessary to develop large-scale, efficient production technologies that can be adapted to new materials. Costs: Material and manufacturing costs are currently still higher than those of conventional technologies, but growing demand and innovation are already starting to narrow this gap. Innovation and the future: towards large-scale green electronics The prospects for biodegradable organic electronics are extremely promising. Research is exploring new classes of materials, such as cellulose-based nanocomposites, enzyme-functionalized inks, and biointerfaces capable of communicating with living systems. It is expected that, with the refinement of production techniques and the growing awareness of the circular economy, biodegradable electronics could become a fundamental component of sectors such as healthcare, smart agriculture, logistics, and large-scale retail. Conclusions: Sustainability as an added value in electronic design In a world increasingly focused on sustainability, biodegradable organic electronics represents one of the most concrete and innovative responses to the environmental challenges of our time. Not only does it reduce the impact of technological waste, it also paves the way for new design, production, and consumption models, aligned with the principles of the circular economy. While several technical challenges remain to be overcome, scientific progress and the growing demand for green solutions are accelerating the adoption of these devices, transforming the idea of disposable electronics into a responsible and sustainable choice. © Reproduction Prohibited
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Historical evolution of the means of climbing the walls and of the relationship with the technical company From the end of 1800 when the first pioneers, not yet defined mountaineers, ventured into the mountains in an attempt to reach the peaks, there was more a cognitive thrust of the mountain environment than a sporting one. They climbed, geologists eager to study little-known areas, military with the aim of updating the geographical maps as much as possible and climbed, intrepid gentlemen, who had the money to be accompanied by local guides. We can say that the mountaineering movement was born after the Second World War, when the climbs of the eight thousand Himalayans began, intended as a land of national conquest, with a race for who first he reached the summit. The 50s and 60s of the last century spent experiencing a "military" mountaineering, where expeditions were rigidly organized as assaults on meticulously prepared peaks, with a army of climbers, porters, cooks, journalists, executives and liaison men. Nothing was left to chance as they were there only to conquer the summit, at all costs and by any means available. The mountain was an object to be taken, a means with which to give oneself glory and a pill to increase the self-esteem of a country and a people. Oxygen was used to climb to altitude, fixed ropes that were abandoned on the spot, advanced camps were equipped with tents, stoves, gas cylinders and oxygen that were left on the mountain, as if it were an open-air trash can. Having conquered all 8000, the youngest alpinists, already at the end of the 1960s, wondered if there was a new form of relationship with the mountain, a a different and more respectful way of approaching the alpine environment. The new mountaineers began to climb the walls, ceasing to think that man had to move with a spirit of conquest at all costs, but he had to fit into the environment, creating a symbiosis with the mountain, being loyal in the athletic gesture that made it possible to climb it. They began to challenge the ascents made by filling the rock with pressure nails, inserted with pneumatic hammers, which gave the possibility to overcome the difficulties that opposed the walls, creating a kind of aerial ladder. They abandoned the use of nails, means seen as a help element to facilitate climbing, starting to use means of protection that would not remain in the walls after the climbed, but recovered by the climbing partner, so as not to leave a trace of the passage. In fact, in 1967, the American mountaineer Royal Robbins saw in England the first prototypes of safety systems to be inserted into the cracks in the rock, without damaging it or it gets destroyed, like the insertion of a nail. He brings this novelty to America and within a few years a Yosemite climber, Yvon Chouinard, begins the production of these sustainable safety systems. These are nuts, movable washers, hollow hexagons, wedges, all in metal and of different shapes and sizes called nuts and friends, which are inserted into the natural slots of the riccia and recovered by the climbing partner. A revolution that baptized the beginning of clean and environmentally friendly climbing, to which traditional climbers who used invasive safety devices looked with suspicion and self-sufficiency. The new approach to rock climbing spread like wildfire throughout the world, marginalizing traditional mountaineering in a couple of decades. Established that the approach to the mountains should be sustainable and non-invasive, the new generations measured themselves, in the years to come, with the overcoming of increasingly difficult walls , using what was called "free climbing" which was based only on the strength, skill and courage of the mountaineer. The walls that had once been climbed with nails and ladders, were covered only through perfect athletic gestures. In the new millennium, when the urge to repeat the technically more complicated walls through free climbing was exhausted, a new form of climbing was born, definitely extreme, which it was characterized by the repetitions of these very difficult routes, without ropes and safety systems. A dangerous mountaineering, for a select few, where man is naked towards the mountain, without safety protections, without the possibility of getting off the wall quickly, without the possibility of being wrong. This discipline is seen, on the one hand by the environment, as the consecration of the technical qualities of an athlete, but on the other hand as a suicidal activity, where a small mistake can put life on the line. The leader of this discipline is the American Alexander Honnold who free soloed the 884m Freerider route in El Capitan on 3 June 2017. with difficulty of 5.12d VI in 3 hours and 56 minutes. Automatic translation. We apologize for any inaccuracies. Original article in Italian. Photo Nat Geo
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Sustainable Thermal Mortars: An Ecological and Versatile Solution for Improving Living ComfortBy Marco ArezioSustainable thermal mortars offer a concrete response to the needs of modern construction, aiming to reduce environmental impact without sacrificing technical performance. Thanks to the combination of recycled materials and low-impact production processes, these mortars provide an advanced solution for thermal insulation and enhanced living comfort. The growing focus on energy efficiency and sustainability has driven the development of increasingly innovative products, capable of meeting the needs of residential, commercial, and industrial buildings.The importance of materials like thermal mortars goes beyond their insulating performance. They play a significant role in promoting a circular economy and reducing waste. This article explores their production, technical characteristics, advantages, and criteria for informed purchasing decisions.How Sustainable Thermal Mortars Are ProducedSustainable thermal mortars consist of a mixture of binders, lightweight aggregates, and specific additives designed to ensure high insulating performance. Their production focuses on minimizing environmental impact, with particular emphasis on using recycled materials, such as:Recycled lightweight aggregates: Expanded perlite, cellular glass, expanded clay, recycled expanded polystyrene, and materials derived from industrial waste, such as ceramic powders or demolition residues. Recycled expanded polystyrene, in particular, is an effective alternative for enhancing the insulating properties of mortars due to its lightness and low thermal conductivity.Regenerated plastic waste: Used in granular form or as fillers to boost insulating performance and reduce the use of virgin resources.Recycled fibers: For instance, glass fibers or polyester recovered from waste materials, which help strengthen the mortar’s structure.Natural or low-impact binders: Such as natural hydraulic lime or eco-friendly cements.Biological or mineral additives: Useful for improving the mortar’s workability, adhesion, and durability.Using these materials not only reduces CO2 emissions during production but also promotes the circular economy by transforming waste into valuable resources for sustainable construction.Technical Characteristics of Thermal MortarsSustainable thermal mortars stand out due to their specific technical properties and are a cornerstone of modern construction. Utilizing innovative materials, many derived from recycling processes, these mortars combine excellent technical performance with reduced environmental impact. Their design aims to meet thermal insulation needs without compromising sustainability, making them ideal for improving building energy efficiency and actively reducing ecological footprints.Thermal insulation: With low thermal conductivity (λ ranging between 0.04 and 0.07 W/mK), they reduce energy dispersion.Breathability: Their high vapor permeability coefficient (μ between 8 and 15) prevents the formation of condensation and mold.Mechanical resistance: Ensures good adhesion and cohesion capacity, adapting to various surfaces.Environmental compatibility: Free from volatile organic compounds (VOCs), they are safe for health and the environment.Advantages of Sustainable Thermal MortarsThe use of sustainable thermal mortars offers numerous advantages, both technical and environmental:Energy efficiency: Helps reduce energy consumption for heating and cooling buildings.Living comfort: Enhances indoor thermo-hygrometric conditions.Durability: Their chemical-physical properties ensure consistent performance over time.Sustainability: Reduces ecological footprints by using natural and recycled materials.Ease of application: Many of these mortars can be applied manually or with plastering machines, simplifying installation processes.What to Know for Informed PurchasingTo choose a sustainable thermal mortar, it is essential to consider several key aspects:Environmental certifications: Verify the presence of sustainability marks like EPD (Environmental Product Declaration) or CAM (Minimum Environmental Criteria).Compatibility with the building: Ensure the mortar is suitable for the type of support and local climatic conditions.Declared performance: Check technical specifications such as thermal conductivity, density, and mechanical resistance.Environmental impact: Prefer products made with renewable or recycled raw materials.Cost and durability: Evaluate the quality-price ratio, considering the product’s longevity and long-term energy savings.Examples of Sustainable Thermal Mortars on the MarketHere are four sustainable thermal mortars available on the market, each with specific technical characteristics:Leca M10 Thermo-Seismic Mortar: Manufactured by Leca, this pre-mixed insulating mortar is ideal for load-bearing, ordinary, and partition walls, even in seismic zones. It offers certified compression strength in class M10 (10 N/mm²) and a thermal conductivity of 0.279 W/mK, improving wall insulation by 10-20%. Lightweight (operational density around 1000 kg/m³), non-combustible (Euroclass A1), and eco-compatible, it is certified by ANAB-ICEA for green building.Blu Mortar by CVR: This lightweight, structural thermal insulation mortar (category M10) is based on pure natural hydraulic lime NHL 3.5 and highly reactive pozzolanic microsilicates. Ideal for green building, it offers high mechanical resistance, excellent vapor permeability, low elastic modulus, and high durability. Fully recyclable at the end of its life, it is compatible with various materials such as solid bricks, perforated bricks, seismic blocks, and natural stones.ThermoMalta by Fornaci Calce Grigolin: Designed for laying bricks and blocks with high insulation, this thermal mortar avoids thermal bridges and ensures an efficient insulation system. It complies with current regulations and guarantees optimal laying for walls with adequate insulation characteristics.Diathonite Thermactive.037 by Diasen: This thermal and bio-based mortar is used in sustainable building projects, such as social housing in the Balearic Islands. It offers excellent insulating properties and contributes to living comfort, effectively integrating into eco-friendly construction solutions.These sustainable thermal mortars combine high technical performance with reduced environmental impact, making them ideal choices for construction and renovation projects focused on energy efficiency and sustainability.ConclusionSustainable thermal mortars represent a valuable solution for those seeking to improve building energy performance while respecting the environment. Their adoption helps reduce energy consumption, cut CO2 emissions, and promote the use of recycled materials like regenerated expanded polystyrene or lightweight waste aggregates. Thanks to their advanced technical characteristics and sustainability benefits, these materials are an intelligent investment for the future, contributing to more efficient and planet-friendly construction practices.© All rights reserved
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The drama of the egalitarian preacher, Brother Elara’s orchestrated sentence, and the long wave of popular protestLondon, August 1381The morning after the verdict, the air in St Albans smelled of pending rain. Two of the king’s halberdiers—crimson tunics emblazoned with golden lions—crossed the cloister to take custody of the prisoner. Accustomed to the whisper of lauds, the priory shuddered beneath the clangour of secular iron come to seize what incense had failed to cleanse.Brother Elara signed the transfer order with a hand stiffer than expected. As he traced his name, the ink seemed to tremble, as though the quill balked at turning words into condemnation. Across the table stood Sir William Knolles, field marshal to young King Richard II: close-cropped beard, parade armour flecked with rust, eyes of one who has seen uprisings quenched by fire.Knolles: “We shall guard the condemned man to London. At dawn tomorrow the escort departs.”Elara: “See that he lacks neither water nor the chance to confess.”Knolles (with a cardboard grin): “Court chaplain handles confessions. As for water—the Thames is large enough.”Ball emerged in chains, a coarse hood covering half his face. At the touch of the fine drizzle he bowed his head—perhaps to pray, perhaps to catch the muted lament rising from the convent kitchens, where the sisters sang a sadder Salve Regina than usual, as though begging pardon for their own silence.A four-wheeled cart with high sides and scattered straw waited in the courtyard. When its tailboard slammed shut, a Servite friar—Brother Athelstan—asked Elara whether he wished to bless the journey. Elara raised his right hand, yet the words came out dry: “Dominus custodiat…” More farewell than blessing—as if unsure whether he was letting go of a man or of a part of himself.The escort joined Watling Street, the Roman paving that wound between oaks and black-thorn hedges. In the ditches curious peasants laid aside hoes and spades to watch the passing of the “chained prophet.” Some crossed themselves, others bowed, still others—few, yet visible—clenched fists inside their tunics.Among the last stood Edmund Webber, a smith from Harpenden: square shoulders, tawny beard, a burn scar on his wrist from an iron bar slipped the winter before. Beside him was his twelve-year-old daughter Alice, eyes wide as newly fallen hazelnuts.Alice (whispering): “Is that him, Father?”Edmund: “Aye, little one. Remember what I told you: listening is no sin.”Alice: “But they say he’s a rebel…”Edmund: “A chain on the wrists makes neither rebel nor saint. The reason for the chain counts.”The cart crept forward, guarded by five archers and two mounted crossbowmen. Beneath the hood, Ball felt the crowd’s murmur and, when the convoy halted to water the horses, asked a soldier, “May I speak a word?”Knolles, annoyed by the request, was about to refuse, but court chaplain Father Morton suggested a public speech would display the king’s “magnanimity.” With a grudging nod, the marshal granted one minute.Ball stood, short chain between his wrists. He did not raise his voice, and for that very reason each syllable rang clearer:“Brothers and sisters, I have received one judgment and await another. The first comes from men, the second from God. If the second acquits me, be at peace; if it condemns me, I shall have earned the iron. While time remains, love justice as you love bread.”Buy the PDF of the book in English© All Rights Reserved
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