Capturing carbon dioxide as it comes out of smokestacks is easy, say scientists. The tough part is sequestering the gas underground so it won't leak out. A big burp could wipe out people living nearby (through suffocation) while a slow leak would put the gas back up in the atmosphere where it would contribute to global warming.
Researchers at MIT have come up with a novel idea that would effectively take advantage of the nearly ubiquitous presence of salt water under the earth's surface.
Under the proposal, CO2 would be captured, compressed and then injected underground into porous … Read more