Klaus Lackner

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Power plants contribute a quarter of the United States’ climate-warming greenhouse gas emissions. Howard C via Getty images

EPA’s crackdown on power plant emissions is a big first step – but without strong certification, it will be hard to ensure captured carbon stays put

Stephanie Arcusa, Arizona State University and Klaus Lackner, Arizona State University

Fossil fuel power plants can avoid most emissions by capturing carbon dioxide and pumping it underground. But to be a climate solution, that carbon has to stay stored for thousands of years.
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, Arizona State University

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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