鈥淲hen there is substantial, credible evidence of danger to human or environmental health, protective action should be taken despite continuing scientific uncertainty.鈥� That鈥檚 the 鈥淧recautionary...
Open a box of old crackers or potato chips and a smell emerges. It isn鈥檛 pleasant. The same goes for that bottle of oil that鈥檚 been sitting in the cupboard for months. It鈥檚 the smell of rancid fat....
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