The climate engineers

For years it's been one of the science community's great taboos but the idea of global climate control is starting to be openly discussed. Ideas like placing giant mirrors in space or firing sulphur particles into the stratosphere to cool the planet are no longer just in the domain of science fiction. Many scientists now believe the time for these ideas will come. Reporter, Wendy Carlisle (This program was originally broadcast on 6th April 2008.)