Bacteria are powerful and resilient little machines. Scientists are working on tweaking these microorganisms to do things that are useful to people. In a recent paper, researchers outlined a way to make bacteria take in carbon dioxide and emit methane. This effectively reverses the combustion process and could become an important biofuel pathway.
Going (carbon) negative
The IPCC suggested that bioenergy with CCS could remove greenhouse gas emissions from the atmosphere. I discussed the merits of this approach in this article.