Bacteria

Bio-engineering has given science a new toolbox for slowing climate change: By synthetically altering the DNA in bacteria, bio-engineers may be able to convert microscopic organisms into fuel producers.

If the science reaches its full promise, drivers a few years from now could be filling up with carbon-neutral gasoline, fresh off the bacterial production line.

This technology has the potential to revolutionize the way that we power our lives and to dramatically decrease carbon emissions, but it is still in the early stages of development. That could change with a boost from the U.S. Department of Energy, which has sought to spur growth in low-emissions energy technologies through the recently established Advanced Research Projects Agency-Energy (ARPA-E). The aim is to invest in high-risk, high-rewards innovations that stand to transform the global energy landscape.

"With ARPA-E, we are swinging from the heels and trying to hit home runs, not just base hits. The 37 projects we're funding span the spectrum—from renewable energy, to energy storage, to industrial and building efficiency, to petroleum-free vehicles and carbon capture," Energy Secretary Steven Chu said.

Even one break-through in any of these areas could be a major step toward solving climate change.