Science: As U.S. President Barack Obama finalizes plans to cut greenhouse gas emissions today, climate researchers are wondering whether even more extreme measures will be needed--such as using machines to suck carbon dioxide from the environment. Now, a new study of these so-called carbon dioxide removal (CDR) technologies finds that the strategy would have only a minimal impact.
"You hear CDR mentioned as an option to maybe avoid dangerous climate change, but when we did the simulations you see the effect...