From the window of a Boeing, few countries are greener than Brazil. Since much of this vast territory in the heart of South America is still unpeopled and unblemished, it's not surprising that Brazil looks good against the backdrop of a mistreated planet. It ranks 34th of 149 nations in Yale and Columbia's Environmental Performance Index

The Russian government takes environmental violations seriously

Global warming isn't just a problem of cars and smokestacks but of the chain saw, too.

If anybody needed a reminder of how crippling bureaucracy can be, consider the campaign to clean up the sacred Yamuna River in Delhi. The river oozes through town like a putrid ribbon of black sludge. Its level of fecal bacteria is 10,000 times higher than what's deemed safe for bathing.

Decades of investment in civilian nuclear power puts france in the energy catbird seat.

France ranks 10th in the EPI because of its supply of clean energy.

Not long ago Berlin resisted every push to clean up its act. Now it's showing the way.

A global report card on nations doing the most, and least, to clean up the environment.

Honda has unveiled the future of personal transportation: the FCX Clarity, a hydrogen-powered fuel-cell car that emits only water from its tailpipe and can get the equivalent of 119 kilometers per gallon. The first Claritys were delivered to southern California on June 16, and Hollywood crowds are already lining up to lease it for $600 a month.

We've known for a long time that a high-fat diet, obesity and lack of exercise can increase the risk of developing heart disease and type 2 diabetes, two conditions that affect millions of Americans. What we are finding out now is that those same lifestyle factors also play an important role in cancer. That's the bad news. The good news is that you can do something about your lifestyle.

Ten years ago, when environmental lawyer Kassie Siegel went in search of an animal to save the world, the polar bear wasn't at all an obvious choice. Siegel and Brendan Cummings of the Center for Biological Diversity in Joshua Tree, Calif., were looking for a species whose habitat was disappearing due to climate change, which could serve as a symbol of the dangers of global warming.