This is by far the most clear, comprehensive, and easily accessible video on the state of our world and the impact that human beings are having on it. It's an hour and a half long; please watch it, and share it with everyone you know - not for my sake, but for your sake, everyone else's that lives on Planet Earth, and future generations. Oh yeah, and the sake of our Planet.
The Home Project
P.S. It's on YouTube, so it's free!