If you've been tracking Solar Impulse 2, the solar airplane circumnavigating the globe, then you will be excited to hear this news: the Cochin International Airport in the southern state of Kerala, India is officially the world’s first airport thats runs exclusively on solar power. The entire facility is "absolutely power neutral"—meaning it creates just as much energy as it consumes, according to a statement from the airport.
— CECHR (@CECHR_UoD) August 20, 2015
The airport just launched a 12 megawatt solar power plant earlier this week made up of more than 46,000 solar panels laid across 45 acres. This capacity should allow the airport to generate 50,000 to 60,000 thousand units of electricity per day, which is just over what the airport consumes in a typical day. That is no small feat for India's fourth largest international airport in terms of passenger traffic. It's terminal space—1.5 million square feet—is about the same size as Denver International Airport.
But they didn't go 100 percent solar overnight. The project began in 2013 with a small solar panel array on the rooftops of its terminals. Over the next couple years, the airport relied on a mixture of solar and power from the grid. However, the airport is still connected to the grid, should the normally sun-soaked area experience an extended period of overcast days. As for its impact, the airport claims the array will cut an estimated 300,000 tons of carbon emissions over the next 25 years, the equivalent to planting 3 million trees.
The news comes on the heels of a report from the International Energy Agency which found that renewables are now the world's second largest source of electricity. The evidence of that transition is everywhere. Another airport in India, Kolkata’s Netaji Subhas Chandra Bose International Airport, has laid out plans to go solar too. The Times of India reports that solar projects are popular at airports in the U.S., Canada and Germany. The Indian government plans to invest $100 billion in solar power in the next seven years to boost its capacity from the existing four gigawatt to 100 gigawatt by 2022.
Many high profile companies in the U.S. have invested heavily in renewable energy in recent months as well. Last month, Facebook announced it would power a new data center in Texas with 100 percent wind energy. Amazon announced earlier this summer that it will build an 80 megawatt solar farm in Accomack County on the eastern shore of Virginia. And in a real coup de grâce for dirty energy, Google announced it plans to build a data center powered by 100 percent renewables at a soon-to-be closed coal-fired plant in Alabama.
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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>
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