Earth Day at 40: New Perspectives on the Planet's Health
April 22, 2010, marks the 40th anniversary of the original Earth Day. How far has the planet come in the intervening decades?
![State of the Planet: A Snapshot [Audio Slide Show]](https://static.scientificamerican.com/sciam/cache/file/281C04B5-5746-4A51-8846312578F227EF_agenda.jpg?w=380&h=213&fit=crop)
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...
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...
What's the Most Recycled Product in the U.S.?
It's not paper, plastic or even aluminum. David Biello reports
Celebrate Earth Day: Buy! Buy! Buy!
A casual spin last night through the pile of ads inserted inside my local Sunday newspaper made it clear to me that the best possible thing we all can do this week to honor Earth is to shop till we drop...
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?
At 39, Earth Day moves beyond: Reduce, reuse, recycle
Today marks the 39th annual Earth Day, an idea hatched by Wisconsin Senator Gaylord Nelson in 1969 to "shake up the political establishment and force this issue into the national agenda," according to the Earth Day Network, a nonprofit that helps organize the day...
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
Policymakers take aim at new recycling frontier: Solid waste, retailers and packaging
NEW YORK—It's human nature to conserve and hoard, so a lot of Americans today take a certain pleasure in their trash habits when it comes to recycling paper, plastics, glass and cans...
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
Being Green: 10 Earth-Friendly Habits You Can Adopt
Passive cooking, gas cap checkups, neighborhood dating and more
Can greener gadgets save us from e-waste?
One laptop per child seems a simple slogan, chock full of benefit. What could go wrong when you put the power of the Internet and solar cells into the hands of children in the developing world?...
Copenhagen and Climate Change
The people of the world continue to grapple with the question of how best to combat climate change
The Future of Alternative Energy
Geothermal, solar thermal, and even nuclear power could provide alternatives to today's carbon-based fuel sources
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?
Living On a New Earth
Humankind has fundamentally altered the planet. But new thinking and new actions can prevent us from destroying ourselves
