This was on 60 minutes last night. It's interesting. I don't think it's the answer, but it's something.
Inside efforts to scale direct air capture to slow climate change | 60 Minutes
Carbon dioxide is captured from the air and buried underground as part of groundbreaking new technology to slow climate change. Bill Whitaker met with teams making it happen in Iceland.www.cbsnews.com
Interesting. I can think of many a scifi show with 'atmospheric scrubbers' of some type