The cause of global warming on venus is disputed but one major cause could be a giant asteroid/meteor hitting the planet. Basically think of it as a doomsday scenario on earth but it happened to Venus millions and millions of years ago. The basis behind that is venus is the only planet that rotates counter-clockwise, and it does so very very slowly. A very large asteroid hitting the planet opposite the motion of rotation could have caused the momentum to swing the other way. Burning coal and gasoline will never create an environment like the one on venus, but it does make for interesting research
Agreed.