WHEN THE EARTH HOLDS ITS BREATH

My Herald on Sunday column is about moves afoot to make carbon sequestration a viable method of reducing carbon dioxide emissions and therefore reduce the effects of global warming.

The idea is that we inject the carbon coming from polluting energy plants into pockets in the Earth that used to be filled with natural gas and oil.

Phil Welch, the Herald on Sunday's graphics editor has put together a helpful diagram to show how it works: