The Pentagon enlists alternative energy—not because of climate change, but to save soldiers' lives.
Experience nature as your ancestors did: Lose the clunky shoes.
Gear to help you hit your stride.
How to design communities that don't require cars.
A pedaling purist comes around to electric bikes.
Cellist Ben Sollee goes on tour ... by bike.
Can a week in the wilderness help war vets' stress?
What our readers have to say
Protecting kids from heavy metal
º Ecofriendly ice cream
º Planet-cooling cookware
Mr. Green on low-carbon lawnmowers and washers
Hassan's Turtle Beach, Nothern Cypress
Turn a keyboard into a wallet
A father shows his son the ropes
The Burren, County Clare, Ireland
º Bee-killing pesticide
º How bad is a banana?
º The Yoda bat
º Up to Speed
Alaska's outer limits
Bracing for the black swans
º Obsessive peakbagger
º Board election: Who won?
º Transportation wonks on a roll
What tangled webs