It's not just global warming, it's not just a loss of biodiversity, it's not just the pollution of our oceans and the clearing of our rainforests and all these complicated systems, The [11th Hour] movie talks about the world economy, it talks about politics, it talks about personal transformation and environmental consciousness that we need to have in this generation to implement a lot of these changes that need to occur.

I am not a scientist, but I don't need to be.

(Acting) certainly comes-100 percent-from the need to be loved. Any actor who says this isn't true is lying.

We [ with Russel Crowe] had an Arabic coach there [ in the Body of Lies] that was really helpful, because it was more so than any accent. You have to be so exact, and there's different dialects of Arabic from country to country so it was really, really difficult to tell you the truth. And one of the hardest things I've ever had to do language-wise, because it comes from the throat. It's different. And also learning about the customs and the culture and all that, so we had advisors for that sort of thing.

I believe humankind has looked at Climate Change in that same way: as if it were a fiction, happening to someone else’s planet, as if pretending that Climate Change wasn’t real would somehow make it go away.

People always ask, 'Was it fun? Was it fun working on a movie?' I don't know if that's the operative word. It is challenging and interesting and all those other things, but fun isn't always.

Right now, our mother -- our mother -- all of our mothers, Mother Earth is hurting. And she needs a generation of thoughtful, caring and active kids like all of you to protect her for the future. You can help us win the battle to clean up our air, our water, our land, to protect our forests, our oceans and our wildlife.