global-warming - Google News
Study raises hope of combating global warming by reducing soot - Christian Science Monitor
Study raises hope of combating global warming by reducing soot Christian Science Monitor Between 1989 and 2008, clean-air rules in California virtually halved the concentrations of black-carbon soot in the state's skies, in effect reducing the state's carbon footprint by the equivalent of cutting carbon dioxide emissions by 21 million tons ... |