Charles Manson may be the last person that comes to mind when you think of environmental activism, but in an interview with Vanity Fair Spain, the convicted killer and cult leader urges people to pay attention to the health of the planet.

“Everyone’s God, and if we don’t wake up to that there’s going to be no weather because our polar caps are melting because we’re doing bad things to the atmosphere," Manson said, breaking a silence that has lasted 20 years. "The automobiles and fossil fuels are destroying the atmosphere, and we won’t have air to breathe. If we don’t change that as rapidly as I’m speaking to you now; if we don’t put the green back on the planet and put the trees back that we’ve butchered, if we don’t go to war against the problem…”

Manson doesn't finish his sentence, but you get the idea. From anyone else, such a statement would find an agreeable audience, but coming from a madman, the comments are haunting. After all, this is the same guy who ordered the brutal killings of eight people — including actress Sharon Tate and her unborn child. The massacres would later be turned into the best selling crime novel, "Helter Skelter."

Manson, now 76 and serving a life sentence for the murders, is apparently also a founding member of ATWA, an acronym that stands for Air Trees Water Animals and All the Way Alive. The group's mission statement mentions pollution and the destruction of the planet. Another founder of this organization is Lynette Fromme, a member of the Manson family who was jailed for her attempted assassination of President Gerald Ford in 1975.

After she was taken into custody, she said about the attempt, “I was so relieved not to have to shoot it, but, in truth, I came to get life. Not just my life but clean air, healthy water and respect for creatures and creation.”

Manson obviously shares these sentiments, adding in the Vanity Fair interview: "We've got to put everything in one, everything in one world, everything in one world now. If it doesn't come to one world now, there'll be no planet, there'll be no life on the planet."

Check out an ABC News video of the Manson interview below to hear some recorded excerpts and some other chilling responses.

Michael d'Estries ( @michaeldestries ) covers science, technology, art, and the beautiful, unusual corners of our incredible world.

Charles Manson warns of global warming
Cult leader and convicted killer breaks 20-year silence, promotes environmentalism.