December 2008 Earth 3.0: Solutions for Sustainable Progress

Some ecotravel destinations, along with ideas on how you can protect the environment while enjoying a relaxing vacation--no matter where you go

Experience the awe of mass migrations

Mayor Richard Daley has unveiled an aggressive plan to transform the old, gritty city. If he can pull it off, other cities might follow

Tips from weatherproofing to a guilt-free Christmas

Ecotourism has become the unlikely protector of the unexpectedly endangered great white sharks

To save orangutans, scientist Willie Smits is restoring a rain forest—and creating new livelihoods for the Indonesian families who help him

A novel carbon trading system would reduce warming... and pay consumers

Tax oil if prices drop? No way! Yet if we don't, we can say good-bye to renewable energy

Ranchers in Montana are being paid by polluters to keep their grass unmowed

The new president must take bold steps, right away, to tackle the nation's energy challenge

Letter from Scientific American Earth 3.0 Managing Editor Mark Fischetti

Newly approved reactor designs could reduce global warming and fossil-fuel dependence, but utilities are grappling with whether better nukes make market sense

China is aggressively building cleaner cities and renewable power supplies, but the relentless expansion of dirty coal may suffocate those efforts. A firsthand look

Steve Mirsky talks with Pulitzer Prize-winning author Thomas L. Friedman on how green technology can save the world economy

A few simple gadgets for the home would prod people into saving energy