The biggest investment Key Largo, Florida, homeowners John Hammerstrom and Diane Marshall made toward energy efficiency in their eco-friendly home is the 2.8-kilowatt Kyocera solar panel system that adorns their rooftop.
This past April, entrepreneur and science hobbyist Lloyd Godson awoke in the middle of the night with a pounding headache. He needed fresh air. Instead he drew in a deep breath and hoped that the algae blooms inside his 8-by-10-foot underwater home would give off enough oxygen to get him through the night.
As the highway jumps from Florida's mainland to the string of islands known as "the Keys," travelers immediately sense a difference. Giant red-and-white dive flags signal Key Largo's place as the sport-diving capital of the world. Souvenir shops peddle shells, coconuts and kitschy nautical collectibles. And funky (not in a good way) motels line both sides of the thoroughfare.
On a rocking boat in the Atlantic Ocean, astronaut Dave Williams struggled into his wetsuit. After helping build the International Space Station in 1998, a dive into the sea was the unlikely beginning of his journey back into space.