
Hemp is making a major comeback around the world. In the U.S., five states have legalized the recreational use of cannabis and hemp-based building materials are now gaining popularity.
Photo credit: Push Design
Photo credit: Push Design
The first house built in the U.S. with hemcrete was constructed in Asheville, North Carolina and the 3,400 square foot Push House boasts a number of eco-friendly features.
To create a solid—yet breathable—wall system, hemp hurds were mixed with lime and water on-site an poured in-between the exterior supporting studs in lift.
Photo credit: Push Design
As USA Today notes, hempcrete is actually less like concrete and more like infill straw bale, as it is non-structural. The insulating quality is r-2.5 per inch and it has the unique ability to capture airborne pollutants over time—absorbing carbon when it is grown and in place.
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In addition, the material’s high thermal mass helps keep a steady interior temperature, rather than allowing it to fluctuate.
Photo credit: Push Design
Photo credit: Push Design
The interior walls of this gorgeous, eco-friendly house are made from Purepanel, a unique product made from recycled paper. It consists of a rigid skin with a corrugated paper core, similar to cardboard. (Below).
Photo credit: Push Design
Photo credit: Push Design
As CNN reports, the house also features 30 salvaged window frames that have been fitted with high tech glass. They were placed to allow the most daylighting without overheating the space. An open floor plans also allows the light to pervade deep into the home.
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That’s not all: The energy-efficient wall system is coupled with a super efficient 21 SEER air-based heat pump to effectively heat and cool the home, reducing utility costs and also the need for expensive equipment. With these installments this home ends up costing a respectable $133 per square foot to build.
Photo credit: Push Design
Photo credit: Push Design
Some compromises were made, such as introducing petroleum-based foam products into the ceiling and foundation. However, the house is a stellar example of how health, energy and design can co-exist in sync.
Photo credit: Push Design
Photo credit: Push Design
The architect is looking forward to constructing similar, smaller homes in the future once he gets through the learning curve of using Hemcrete. Admirably, he says from here on out he will only build houses safe enough for his daughter to live in; we applaud that.
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- Redwoods are the world's tallest trees.
- Now scientists have discovered they are even bigger than we thought.
- Using laser technology they map the 80-meter giants.
- Trees are a key plank in the fight against climate change.
They are among the largest trees in the world, descendants of forests where dinosaurs roamed.
Pixabay / Simi Luft
<p><span>Until recently, measuring these trees meant scaling their 80 meter high trunks with a tape measure. Now, a team of scientists from University College London and the University of Maryland uses advanced laser scanning, to create 3D maps and calculate the total mass.</span></p><p>The results are striking: suggesting the trees <a href="https://www.nature.com/articles/s41598-020-73733-6" target="_blank" rel="noopener noreferrer">may be as much as 30% larger than earlier measurements suggested.</a> Part of that could be due to the additional trunks the Redwoods can grow as they age, <a href="https://www.nature.com/articles/s41598-020-73733-6" target="_blank" rel="noopener noreferrer">a process known as reiteration</a>.</p>New 3D measurements of large redwood trees for biomass and structure. Nature / UCL
<p>Measuring the trees more accurately is important because carbon capture will probably play a key role in the battle against climate change. Forest <a href="https://www.wri.org/blog/2020/09/carbon-sequestration-natural-forest-regrowth" target="_blank">growth could absorb billions of tons</a> of carbon dioxide from the atmosphere each year.</p><p>"The importance of big trees is widely-recognised in terms of carbon storage, demographics and impact on their surrounding ecosystems," the authors wrote<a href="https://www.nature.com/articles/s41598-020-73733-6" target="_blank"> in the journal Nature</a>. "Unfortunately the importance of big trees is in direct proportion to the difficulty of measuring them."</p><p>Redwoods are so long lived because of their ability to <a href="https://www.nature.com/articles/s41598-020-73733-6" target="_blank" rel="noopener noreferrer">cope with climate change, resist disease and even survive fire damage</a>, the scientists say. Almost a fifth of their volume may be bark, which helps protect them.</p>Carbon Capture Champions
<p><span>Earlier research by scientists at Humboldt University and the University of Washington found that </span><a href="https://www.sciencedirect.com/science/article/pii/S0378112716302584" target="_blank" rel="noopener noreferrer">Redwood forests store almost 2,600 tonnes of carbon per hectare</a><span>, their bark alone containing more carbon than any other neighboring species.</span></p><p>While the importance of trees in fighting climate change is widely accepted, not all species enjoy the same protection as California's coastal Redwoods. In 2019 the world lost the equivalent of <a href="https://www.worldwildlife.org/threats/deforestation-and-forest-degradation" target="_blank" rel="noopener noreferrer">30 soccer fields of forest cover every minute</a>, due to agricultural expansion, logging and fires, according to The Worldwide Fund for Nature (WWF).</p>Pixabay
<p>Although <a href="https://c402277.ssl.cf1.rackcdn.com/publications/1420/files/original/Deforestation_fronts_-_drivers_and_responses_in_a_changing_world_-_full_report_%281%29.pdf?1610810475" target="_blank" rel="noopener noreferrer">the rate of loss is reported to have slowed in recent years</a>, reforesting the world to help stem climate change is a massive task.</p><p><span>That's why the World Economic Forum launched the Trillion Trees Challenge (</span><a href="https://www.1t.org/" target="_blank" rel="noopener noreferrer">1t.org</a><span>) and is engaging organizations and individuals across the globe through its </span><a href="https://uplink.weforum.org/uplink/s/uplink-issue/a002o00000vOf09AAC/trillion-trees" target="_blank" rel="noopener noreferrer">Uplink innovation crowdsourcing platform</a><span> to support the project.</span></p><p>That's backed up by research led by ETH Zurich/Crowther Lab showing there's potential to restore tree coverage across 2.2 billion acres of degraded land.</p><p>"Forests are critical to the health of the planet," according to <a href="https://www.1t.org/" target="_blank" rel="noopener noreferrer">1t.org</a>. "They sequester carbon, regulate global temperatures and freshwater flows, recharge groundwater, anchor fertile soil and act as flood barriers."</p><p><em data-redactor-tag="em" data-verified="redactor">Reposted with permission from the </em><span><em data-redactor-tag="em" data-verified="redactor"><a href="https://www.weforum.org/agenda/2021/03/redwoods-store-more-co2-and-are-more-enormous-than-we-thought/" target="_blank">World Economic Forum</a>.</em></span></p>EcoWatch Daily Newsletter
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Kentucky is coping with historic flooding after a weekend of record-breaking rainfall, enduring water rescues, evacuations and emergency declarations.
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