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( This includes toxins , flammables , Ozone Depleting Substances , corrosives , irritants , reactives , carcinogens , blood , or other potentially infectious materials . Mutations also are seen in the genes that activate and deactivate carcinogens , and in those that govern the cell cycle , cell senescence ( or " aging " ) , cell suicide ( apoptosis ) , cell signaling , and cell differentiation . AMES Practically everything in the supermarket , if you really looked at it at the parts per billion level , would have carcinogens . This would close a recycling loophole that allows millions of pounds of heavy metals , carcinogens , and dioxin to be incorporated into fertilizer and applied to the nation 's farmland . Clean air , safe drinking water , pesticides , electromagnetic fields , asbestos , carcinogens , hazardous waste , global warming , asthma in urban children , West Nile virus , bioterrorism . These pesticides are classified as acute poisons , carcinogens , neurotoxins , reproductive or developmental toxins or are known to have contaminated groundwater in California . When hazardous chemical forms of the radionuclides are used , such as radiolabeled carcinogens or toxins , increased risks are presented by the vapors , aerosols or gases present or generated in the use . " Items intended for human consumption shall not be placed in any refrigeration unit that is used , or has been used , for the refrigeration of any chemical included in the NIOSH Registry of Toxic Effects of Chemical Substances , radioactive material , etiological agents , carcinogens , drugs , other hazardous or toxic substances , or any other item not intended for human consumption .