SEARCH Articles Figures Tables Effects of Pollutants on the Biosphere Biodegradability, Toxicity, and Risks Factors Determining the Toxicity of Organic Pollutants to Animals and Plants Office of Pollution Prevention and Toxic Office of Pollution Prevention and Toxic Substances Office of Pollution Prevention and Toxics Office of pollution prevention and toxics OPPT) Speciation to Assess Potentially Toxic Metals (PTMs) Bioavailability and Geochemical Forms in Polluted Soils Story of Lead Toxicity and Pollution Toxic Pollutants Toxic pollution US-Environmental protection agency Office of Pollution Prevention and Toxics USEPA Office of Pollution Prevention and Toxics