After approval of glyphosate in the pesticide industry in Europe, the controversial weedkiller is being investigated. Scientists' concerns about cancer and Parkinson's disease are discussed. In the United States, chemical giant Bayer is being sued by cancer patients after exposure to glyphosate. Court documents show that the chemical giant continues to keep their profitable products on the market. An American scientist, whose name appears in the European glyphosate dossier, appears to have previously questioned the dangers of diesel smoke and asbestos on behalf of the industry.