This Scientist Is Taking the Next Step in Geoengineering

Harvard professor David Keith has done as much as any single researcher to push the touchy topic of geoengineering toward the scientific mainstream (see "Cheap and Easy Plan to Stop Global Warming").

He was among the first to seriously assess potential ways of altering the climate to ease global warming, and he has undertaken some of the most detailed research on a promising approach known as stratospheric injection. He also wrote a book on the subject, A Case for Climate Engineering, and co-manages a Bill Gates–backed energy and climate fund that has supported research in this area. This year, Keith helped launch Harvard's Solar Geoengineering Research Program, and announced plans with a colleague to carry out what would be among the earliest outdoor experiments in the field (see "The Growing Case for Geoengineering")....