Nature

Why Can't We: Predict Earthquakes

Because we don’t know enough about plate tectonics. “We basically have a 50-year-old science, compared with most other sciences, which are hundreds of years old,” says Chris...

Do Diligence

There are 1.6 million nonprofits in the U.S., but only a small number are rated by groups like Charity Navigator (charitynavigator.org)...

Why Can't We: Take Sunscreen in a Pill

While humans can’t pop a capsule to protect our cells from UV damage, it could happen someday if scientists can figure out a natural process that occurs with many forms of ocean coral....

David Milarch

David Milarch discovered his calling as a tree evangelist during a near-death experience from renal failure 19 years ago. “When I came to, there was a ten-page outline that I don’t...

Dan Morrison

Dan Morrison understands the power of face time. While traveling through India in 2006, he met a woman who said her earthquake-ravaged community needed a well but didn’t have the $5,000...

How We Picked Them

To compile our list of top philanthropies, we polled everyone from fellow journalists to independent experts who keep track of nonprofits all over the world, and we used Facebook and Twitter to...

Why Can't We: Genetically Modify Plants to Eat Up CO2

Plants take in a lot of CO2 and release a lot of oxygen. And while they’re doing this good deed, they trap carbon for the life of the plant. But when, say, a huge tree falls over and dies,...

Climate Counts

BY THE NUMBERS: 150 major companies, from Disney to General Electric, are rated annually on their climate practicesWHO'S IN CHARGE: Mike Bellamente, 35, who led a team from the U.S....

Water for People

BY THE NUMBERS: The group helped more than 188,000 people gain access to clean water in 2010.WHO'S IN CHARGE: Ned ­Breslin, 46, formerly a Mozam­bique country representative for...

World Bicycle Relief

BY THE NUMBERS: More than 88,000 bikes distributed and sold in developing nations since 2005WHO'S IN CHARGE: F. K. Day, 51, executive vice president of SRAM Corporation, the largest...

American Forests

BY THE NUMBERS: Nearly 40 million trees planted in the past 21 yearsWHO'S IN CHARGE: Scott Steen, 47, former executive ­director of the American Ceramic Society, an organization for...

African Wildlife Foundation

BY THE NUMBERS: Currently backing 31 conservation-oriented projects that generate more than $2 million annually for African communities; spent $19 million on programs in 2010WHO'S IN...

Big City Mountaineers

BY THE NUMBERS: More than 15,000 urban teenagers have taken part in sponsored outdoor trips since 1989.WHO'S IN CHARGE: Executive director Lisa Mattis, 41, former director of individual...

1% for the Planet

BY THE NUMBERS: In 2010, 1,450 companies donated $22 million to environmental organizations through 1%.WHO’S IN CHARGE: Terry Kellogg, 39, a Yale-trained MBA who was the first...

Pages