Pollution Prevention Act of 1990
The triangular image is part of the Pollution Prevention Act of 1990. The Pollution Prevention Act was created to make a policy of national pollution prevention. It encourages any prevention or reduction at the source of the pollution, then to recycle to reduce the pollution, next to use the toxic chemicals as a source of energy production, then to treat the pollution environmentally safe, and then finally to properly and environmentally dispose of the pollution. This process is shown by the triangle image.
"Source Reduction includes activities that eliminate or reduce the generation of chemical waste. Recycling includes the recovery of a toxic chemical in waste for reuse. Energy Recovery includes the combustion of toxic chemicals in waste to generate heat or electricity. Treatment includes the destruction of a toxic chemical in waste. Disposal or Other Releases includes toxic chemical quantities entering the environment" ("Pollution Prevention").
"In 2007, livestock and poultry generated 1.1 billion tons of manure." fast fact from Environmental Protection Agency.