Learn about Earth's biodiversity and natural resources. Plus: Explore national parks and state wilderness areas.
Still drinking bottled water? Put a lid on it.
Try to limit daily showers to five minutes and keep those long, luxuriant ones to a minimum.
Eat some sewage sludge, pick up ladies.
It's time to turn our attention to coral before it's too late.
Activist and author blogs about politics, energy and Earth's resources.
Science journalist blogs about humans and other wildlife.