yes, they should. When Al Gore sold out to an oil company, that ended any chance of global warming getting any true credibility.
Climate change: How do we know?
PS- YOU lose credibility every time you pass by the meat and potatoes of the subject and go straight for the dessert tray. Hating al gore has nothing to do with climate change(climate change is a result of global warming) and only a fool bases his judgement on his/her emotional attachment.