To me, the best projects are the ones where you have a pretty good idea of what the spine of it's gonna be, but then all sorts of things happen that you could've never predicted, and those are the magic moments of the films.

Of course no documentary is completely 'objective.' Every decision you make - who to interview, how to edit, where to hold the camera - imposes a point of view on the film.

When you are interviewing someone, never let your camera person turn off the camera. The second you turn off the camera, they'll say the magic thing that you'd been looking for the whole interview. People want to relax after the performance is done. Don't be afraid of awkward silence. That is your friend.

I'm looking for a charismatic character - somebody who you just want to look at and listen to and whom the camera likes. I'm also looking for a narrative arc: Something is going to happen, and there will be a question that will make you wonder what happens at the end.

Urban residents, most of them middle class, have a much better sense of their environmental rights, and they're willing to take to the streets.

Congress created tax-exempt 501(c)(4)s to operate exclusively for social welfare purposes like early childhood education, environmental protection, and veteran's assistance. However, an IRS regulation allows 501(c)(4)s to operate primarily for the promotion of social welfare.

I don't think we're yet evolved to the point where we're clever enough to handle a complex a situation as climate change. The inertia of humans is so huge that you can't really do anything meaningful.

Though Africa is not responsible for emitting greenhouse gases, it is suffering the consequences of climate change.