Shoot up and cool down: fighting global warming

Injecting sulfur into the atmosphere to slow down global warming is worthy of serious consideration, according to 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. His thought-provoking paper is published in the August issue of the Springer journal Climatic Change, devoted this month to the controversial field of geoengineering.