The precautionary principle embodies the core value for making prudent health and environmental decisions. The principle highlights the need to prevent harm or danger, rather than dealing with it after the fact. In essence it espouses “better safe than sorry” thinking.  The precautionary principle invokes a careful scientific analysis on the potential outcome of a plan or situation.  When there is evidence of possible harm, the precautionary principle compels us to err on the side of caution for the sake of human health and the environment.