Are you concern about global warming?

here is a 1 hour 16min video about global warming. it says that global warming doesnt even exist - that its just there to help politicians sound good when they are using government spending to stop it i really don't know whether or not global warming does exist but this video is quite convincing to me If global warming does exist, it would be pretty hard to stop with all of the factories, cars, and stuff could some others watch the vid and comment on it please