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Articles on Carbon dioxide (CO2)

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Changes in vegetation and temperature affect wildlife and humans, as well as the climate. Lisa Hupp/USFWS

Arctic greening won’t save the climate – here’s why

The growing season on the tundra is starting earlier as the planet warms, but the plants aren’t sequestering more carbon, a new study finds.
Ragweed pollen, instigator of headaches and itchy eyes across the U.S. Bob Sacha/Corbis Documentary via Getty Images

Pollen season is getting longer and more intense with climate change – here’s what allergy sufferers can expect in the future

Rising temperatures mean longer, earlier pollen seasons, but the bigger problem is what carbon dioxide will do to the amount of pollen being released. A 200% increase is possible this century.
One ‘mechanical tree’ is about 1,000 times faster at removing carbon dioxide from air than a natural tree. The first is to start operating in Arizona in 2022. Illustration via Arizona State University

These machines scrub greenhouse gases from the air – an inventor of direct air capture technology shows how it works

Klaus Lackner is finding new ways to cut the technology’s high costs and energy demand, and he’s about to launch the first ‘mechanical tree’.
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Liquid marbles: how this tiny, emerging technology could solve carbon capture and storage problems

Critics say investing in carbon capture and storage means betting on technology that’s not yet proven to work at scale. Using liquid marbles could make a huge difference.

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