Engineering Earth 'is feasible'

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.

Suggestions range from having giant mirrors in space to erecting giant CO2 scrubbers that would "clean" the air.

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