heres an idea....
regular trees....
it might just be crazy enough to work!
The study, led by a team from Lawrence Berkeley National Laboratory and Oak Ridge National Laboratory, analyzed ways plants process carbon dioxide and convert it into forms of carbon.
The findings could one day lead to a forest of trees and other plants genetically engineered to pull in billions of tons of carbon from the air, counteracting the effects of global warming.
Hemp is also a beneficial crop for the Earth itself. It is very easy on the land. It doesn't need many nutrients, so it doesn't require chemical fertilizers. Hemp outcompetes other weeds, so it doesn't need herbicides to thrive. Even hemp strains that are 100 percent THC-free produce their own resins that make the crop naturally pest-free, so it doesn't require toxic chemical pesticides. Hemp actually leaves the soil in better condition than before it was planted.