About 400 million metric tons of hazardous wastes are generated each year."Pollution ". Microsoft Encarta Online Encyclopedia 2009. The United States alone produces about 250 million metric tons. Americans constitute less than 5% of the world's population, but produce roughly 25% of the world's ,"Revolutionary maps zoom in on greenhouse gas sources ". Purdue University. 7 April 2008. and generate approximately 30% of world's waste.Alarm sounds on US population boom. 31 August 2006. The Boston Globe. In 2007, China overtook the United States as the world's biggest producer of ,"China overtakes US as world's biggest emitter". Guardian.co.uk. 19 June 2007. while still far behind based on per capita pollution (ranked 78th among the world's nations)."Ranking of the world's countries by 2008 per capita fossil-fuel CO2 emission rates. ". CDIAC. 2008.
About 400 million metric tons of hazardous wastes are generated each year."Pollution ". Microsoft Encarta Online Encyclopedia 2009. T.he United States alone produces about 250 million metric tons. Americans constitute less than 5% of the world's population, but produce roughly 25% of the world's ,"Revolutionary maps zoom in on greenhouse gas sources ". Purdue University. 7 April 2008. and generate approximately 30% of world's waste.Alarm sounds on US population boom. 31 August 2006. The Boston Globe. In 2007, China overtook the United States as the world's biggest producer of ,"China overtak.es US as world's biggest emitter". Guardianco.uk. 19 June 2007. while still far behind based on per capita pollution (ranked 78th among the world's nations)."Ranking of the world's countries by 2008 per capita fossil-fuel CO2 emission rates. " CDIAC. 2008.