Some Harvard scientists suggest that we could turn back the clock on global warming by sucking CO2 out of the air and de-acidifying the oceans.

Says weather engineer Kurt Zenz House:

The technology involves selectively removing acid from the ocean in a way that might enable us to turn back the clock on global warming — removing CO2 directly from the atmosphere while simultaneously limiting the rate at which man-made CO2 emissions are acidifying the ocean Essentially, our technology dramatically accelerates a cleaning process that Nature herself uses for greenhouse gas accumulation.
These kinds of massive geo-engineering projects are becoming more and more popular as solutions to the geo-engineering project, known as global warming, which we've been undertaking without realizing it for decades. Maybe the best way to reverse climate change is to treat the Earth as a massive system that we can hack. No "hack the planet" jokes, please. Image courtesy of Mikefl99 .

Engineered Weather [Eurekalert!]