The National Oceanic and Atmospheric Administration (NOAA) announced last week that carbon dioxide concentrations at the Mauna Loa Observatory in Hawaii surpassed the milestone 400 parts per million for a sustained period.

Compiling a detailed volume on all the primates of the world had been attempted a few times in the past, but never in a way that captured the full diversity of these creatures. I decided I would take on this task.

I want your kids to get going as ECO-Action Detectives. It really doesn't matter what you do to start saving the world, but it is important to start doing something. Everything we do has an impact on the world. Everything has a cost -- ECOlogically and ECOnomically.

Cars, cosmetics, to-go cups, heaters, plastic wrap -- where would we be without the black gold? Which begs the question: Which would you choose if faced with the stark choice between the tranquility of trees and the utility of oil?

Stafford and Easton are both pioneers in a world where everything seems already to be known. Both found their way into the inner recesses of nature, and both came away radically changed by the experience.

Perhaps the secret to climate recovery is less in presenting the global projections of a future climate -- with all their unavoidable and scary uncertainties -- and more in encouraging and empowering people to watch their own backyards closely.

Can a tree tell the story of some forms of capitalism better than an economics lecture? Perhaps.

Today, Disney adds its significant voice to the growing chorus of companies demonstrating that there's no need to sacrifice endangered forests in Indonesia or elsewhere for the paper we use every day.

In many ways, Tarzan was the first rainforest conservationist -- protecting the forest and its animals against hunters, trappers and other forms of exploitation from the outside world. He was truly a man ahead of his time.

In the Olympics of forest defense, protection of natural rainforests from destruction by the companies feeding voracious markets is what will make the difference between a gold medal and unimaginable loss... and optimistic it may be, but I'm putting my money on a win.

Scientists drilling off the coast of Antarctica made a startling discovery recently that could hold clues to the Earth's future -- especially if clima...

The extinction of the world's great apes, taking place in remote rainforests and seemingly out of our control, is much closer than you might imagine -- and the solution is nearer still.

Chevron is guilty of massive environmental crimes in the Amazon, but has chosen to spend millions on lobbyists, lawyers and PR firms instead of paying for a clean up of its mess.