Some things have such grim consequences - - -
That a reasonable and prudent person would take precautions even if the warning weren't 100% sure.
For instance, I quit smoking even no one guaranteed I would get lung cancer or emphysema. Wasn't worth the chance.
Mans' influence on global warming and the risks posed by Genetic Modifications are two of the things which could have disastrous consequences. Would probably be best to leave these genies in the box, or mitigate the causes, until the risks were better known.
However, that would take a little prudence, a bit of forgoing an immediate gratification, maybe even passing up a fast buck.
Ain't gonna happen. Too bad.
Arf