What’s that sucking sound?

Pumping vast amounts of CO2 underground is a proposal to reduce global warming.

Huge underground reservoirs can gobble up CO2 in cool geological aquifers or reservoirs, where it can remain harmlessly for many thousands of years. In some cases, the gas can be solidified into dry ice and kept in underground storage.

CO2 gas can be diverted and captured at point sources and piped to underground vaults. Approximately one third of all CO2 emissions due to human activity come from fossil fuels used for generating electricity, with each power plant capable of emitting several million tonnes of CO2 annually.