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A leak of gas from a platform 150 miles off the Scottish coast is causing concerns, particularly over risks of explosion. We look at the environmental effects of the gas and ways of clearing it up. As with oil spills bacteria may play a role in its dispersal.

An environmental conference in London this week gave scientists the chance to get together ahead of the next round of international climate change negotiations. We look at the subject of geo 鈥揺ngineering. Once the realm of science fiction, the idea of using chemicals to seed clouds or reflect light back from the sun is now being seen as a serious option for dealing with climate change.

So You Want to be a Scientist. The clothes are ready for our experiment looking at the arguments over vertical versus horizontal stripes, which ones really do have a slimming or fattening effect?