(Cover) - EN Showbiz - Mark Ruffalo believes social networking site Twitter has changed the world.

The 42-year-old actor who is currently preparing to play superhero, The Incredible Hulk, in The Avengers movie, thinks the introduction of Twitter has been a revelation. The star is able to efficiently connect with millions of people around the world and as a result is able to challenge ignorance. He credits the invention as an imperative tool to try and combat damaging water pollution.

You know, since the Iranian revolution, I started tweeting. Something that conceivably be the most shallow sort of thing was used to cause a revolution and change the world. And I'm able to speak to a lot of people about, you know, hydrofracking, which I've been fighting in upstate New York and other political things. It's helped educate people," he told E! online.

Mark will follow in Edward Nortons footsteps, and portray the angry green mutant for the latest offering in the franchise. He revealed that he has had to alter his body shape for filming and that he is almost at his ideal weight.

Oh baby I'm getting hard! I've lost 15 pounds and I've put another five on of just strapping, pure USDA beef," he excitedly exclaimed. (C) Cover Media