Page last updated at 13:18 GMT, Tuesday, 1 September 2009 14:18 UK

Engineering Earth 'is feasible'

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A UK Royal Society study has concluded that many engineering proposals to reduce the impact of climate change are "technically possible".

Such approaches could be effective, the authors said in their report.

But they also stressed that the potential of geo-engineering should not divert governments away from their efforts to reduce carbon emissions.

Such engineering projects could either remove carbon dioxide or reflect the Sun's rays away from the planet.

Suggestions range from having giant mirrors in space, to erecting giant CO2 scrubbers that would "clean up" the air. Pallab Ghosh reports.

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