According to the International Trade Centre, in 2005, the United States accounted for 47% of the world’s total arms and ammunition exports, making it rank first in that category. The second biggest arms exporting country, France, accounted for only 7% of the total.
According to the International Trade Centre, in 2005 the United States ranked second in terms of the export of radioactive materials. France ranked first.
According to the Netherlands Environmental Assessment Agency, by 2006 China overtook the United States for the top spot in carbon dioxide emissions. The United States now ranks second in that category.
According to the World Resources Institute, five countries (the United States, China, Russia, Japan, and India) contribute more than fifty percent of the world’s total carbon dioxide emissions. The United States ranks first, contributing 22% of the total.
Note: see updated information regarding this ranking here.