Why would they make this stuff up gfire? In any case, surely it is best to err on the side of caution with something as serious as this because if it is right and nothing has been done to stop it we will be in deep sh it as a race. Also is it not a good thing to have a cleaner world anyway?
One day your descendants may very well thank the brilliant scientists and politicians / ordinary bods who had the foresight and knowledge to do summat about this problem before it was too late always assuming there are any descendants to do it.