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<p>Moss growing inside a CityTree</p>

Harnessing moss and machine learning to capture air pollution

Green City Solutions is harnessing the natural filtering powers of moss to fight air pollution in cities.

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Using moss and machine learning to purify air in cities

CityTree uses an interesting combination of methods to filter air in cities.

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<p>Colossal hopes to help bring the woolly mammoth back from extinction.</p>

Woolly mammoths could again walk the Earth in just a few years

Colossal lands $15 million to restore the woolly mammoth to the Arctic. The CRIPSR startup thinks it can birth calves in four to six years.

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How Biden's 'Buy American' initiative plans to 'build back better'

Celeste Drake, the US government's first Made in America director, is tackling supply chain shortages and disaster planning.

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<p>Perfect for students, backpackers, and anyone whose adventures take them far from wall outlets, this <a href="https://www.amazon.com/dp/B07FPHHNDL/?tag=cnet-vig-pics-20" target="_blank">Addtop Portable Solar Power Bank ($46.99)</a> can store up to 25000 mAh worth of juice for when you need it most.</p>

4 cheap ways to get solar power at home ASAP

Not everyone needs large-scale solar panels. These budget alternatives offer the benefits of solar energy without the big price tag.

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Porsche to suppliers: Switch to green energy or lose business in the future

The German carmaker specifically said suppliers will not be considered for future long-term contracts if they don't oblige.

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<p>The 737 Max 9 has a pretty paint job.</p>

Boeing and Alaska Airlines want to make the blue skies greener

The two companies will use a Boeing 737 Max 9 to test new technologies that promise to make aviation greener, safer and more comfortable for passengers.

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<p>Mattel PlayBack is a free way to recycle your old Barbie, Matchbox and Mega toys.</p>

Recycle your Barbies, Matchbox cars and more by mailing old toys to Mattel

Finished playing with it? Mattel will reuse materials for future toys

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Cloud seeding hopes to help fight drought by increasing rain

We visited one of the longest-running cloud-seeding operations in the country to get a demo of the technology behind real weather modification.

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Cloud-seeding site walk-through and demonstration

We visited one of the longest-running cloud seeding operations in the country to get a full demonstration and walk-through of the equipment that aims to increase the rain we get from the clouds passing above our heads.

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New 'artificial blowhole' turns waves into energy and fights erosion

The UniWave200 was recently deployed off the coast of King Island in Tasmania, Australia. To learn more about this deceptively simple piece of tech and its potential applications, I spoke with Wave Swell Energy co-founder Tom Denniss.

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How this 'artificial blowhole' aims to make wave energy mainstream

The UniWave200's design aims to solve problems of efficiency, durability and accessibility that have so far prevented wave energy from joining the ranks of wind and solar.

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