We have created enforceable international laws and agreements quickly and successfully previously with the air pollution caused by the chemical called freon. It was used in refrigeration and air conditioners that when it leaked out was rapidly destroying and causing holes the ozone layer of the atmosphere. We acted quickly because of the scary escalating danger that would have harmed almost everyone on earth.
Tell a devout Christian that his wife is cheating on him, or that frozen yogurt can make a man invisible, and he is likely to require as much evidence as anyone else, and to be persuaded only to the extent that you give it. Tell him that the book he keeps by his bed was written by an invisible deity who will punish him with fire for eternity if he fails to accept its every incredible claim about the Universe, and he seems to require no evidence whatsoever.