April 22, 2010, marks the 40th anniversary of the original Earth Day. How far has the planet come in the intervening decades?
Bill McKibben's Eaarth, Part 1
Writer and activist Bill McKibben talks to Scientific American's Mark Fischetti about his new book Eaarth: Making a Life on a Tough New Planet Part 1 of 2. Edited and produced by podcast host Steve Mirsky
State of the Planet: A Snapshot [Audio Slide Show]
What is the state of our planet, its health and the impact humans have had upon it? Based on maps from the Atlas of Global Conservation, Scientific American brings you the global perspective on our planet in this multimedia presentation.
Celebrate Earth Day: Buy! Buy! Buy!
What's the Most Recycled Product in the U.S.?
It's not paper, plastic or even aluminum. David Biello reports
Living On a New Earth
Humankind has fundamentally altered the planet. But new thinking and new actions can prevent us from destroying ourselves
Policymakers take aim at new recycling frontier: Solid waste, retailers and packaging
Is ARPA-E Enough to Keep the U.S. on the Cutting-Edge of a Clean Energy Revolution?
ARPA-E, the U.S.'s energy transformation agency, is doling out funds for greener power, but is it too conservative?
Can greener gadgets save us from e-waste?
What Is the Right Number to Combat Climate Change?
Is there a safe level of carbon dioxide in the atmosphere to prevent "dangerous anthropogenic interference" in the climate?
Being Green: 10 Earth-Friendly Habits You Can Adopt
Passive cooking, gas cap checkups, neighborhood dating and more
Grappling with the Anthropocene: Scientists Identify Safe Limits for Human Impacts on Planet
Scientists propose a list of planetary boundaries for human impacts ranging from biodiversity loss to the global nitrogen cycle
At 39, Earth Day moves beyond: Reduce, reuse, recycle
Had a Long Day? Global Warming Could Be the Answer
Global warming could speed the time it takes Earth to rotate completely on its axis