The Montreal Protocol on chlorofluorocarbon control established an important precedent for global environmental treaties that include both developing countries and industrial countries. This paper evaluates seven possible treaty proposals to control carbon dioxide (CO₂) emissions. Growth-rate...

Emissions of methane from bovine animals have been estimated elsewhere at approximately 60 million tons per year, 15% of global methane releases. This estimate is misleading for two reasons: it ignores the differences in atmospheric residence time between carbon dioxide and methane, and it...