"The first principle is that you must not fool yourself — and you are the easiest person to fool. " – Dr. Richard Feynman
Therefore some irrefutable repeatable evidence would stop all the arguments and stop everyone expressing an opinion.
Expecting the world to unite and act on something that half the world thinks isn't true ( as there is no evidence) and involves spending trillions of dollars, beggars belief.
Sceptics will quickly and happily become believers, once there is some evidence.
