I see the Climate Change fad as business, a new type of market trading taking advantage of theories which themselves are promulgated by researchers who need a justification for grant proposals, all this pumped by enviromental activists some who sincerely are worried about pollution, others who want to milk it for gain and maybe hookup and get laid at meetings and rallies plus the feel good crowd wanting to pat themselves on the back with FB postings showing how awesome they are in their concern about the peoples of the world.
It's also the lazy person's movement, ideal for an increasingly lazy populace who are online all day and can't be arsed into taking actual action and sacrifice, unlike previous movements.