3 ms·If they build a rocket fuel plant on Earth the carbon footprint will be negative.by jlebrech 9y agoIf they build a rocket fuel plant on Earth the carbon footprint will be negative.ipnon 9y agoSo a solar powered rocket fuel generator would be a carbon sink?kuprel 9y agoIf all the carbon came from Earth and some is burned in space then the footprint on Earth is negative I thinkdeleted 9y ago[deleted]