The Times: A global threat buried
By Anjana Ahuja
May 20, 2004
Energy companies hope that carbon dioxide — the ‘villain’ of global warming — can be stored safely in underground rock formations for thousands of years. Problem solved?
JUST EAST of Houston, Texas, lies an abandoned oilfield. It may be barren but it is by no means redundant. It has just become a testing ground for a technology that could prove crucial in the decades ahead.
American scientists have started trucking in lorryloads of liquefied carbon dioxide from a nearby BP oil refinery and pumping it into the rocks that lie above the emptied oil reservoir. Once underground, the theory goes, the gas will invade the mile-deep alternating layers of sand and shale, and push out the salty water that currently fills its pores. Barring any leakages, the gas will remain there for thousands of years, supposedly safely tucked away from the atmosphere and so unable to contribute to climate change.
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