The Register: Nobel laureate Paul Crutzen from the Max Planck Institute for Chemistry in Germany and the Scripps Institution of Oceanography, University of California at San Diego, has a new proposal to solve global warming. Fire thousands artillery shells into the stratosphere to release sulphur particles. In 1991 sulphur particles from the Mount Pinatubo eruption in the Philippines is thought to have lowered the Earth's average temperature by 0.5 degrees Celsius. Crutzen's research is published in the August issue of Climate Change