- To avoid a global warming catastrophe, humans may need to hack the climate
- Some scientists are inventing machines that suck carbon dioxide out of the air
- Big hurdles to this idea include high cost and what to do with all the carbon dioxide
On Fridays, CNN answers one of our audience's climate change questions as part of the Two Degrees series. Ask your question by filling out this online form. And sign up for the Two Degrees newsletter to learn more.
(CNN)To avoid a global warming catastrophe by the end of the century, humans may need to actually hack the climate.