Environment- msnbc.com

INTERACTIVE

The greenhouse effect
How the Earth maintains a temperature conducive to life

Video: Environment

300 penguins airlifted back home
Oct. 6: More than 300 Magellan penguins who survived an accidental detour to tropical Brazil were airlifted back to colder waters. NBC's Kerry Sanders reports.

The eco-friendly home

Man builds house of recycled tires

Ecotourism strikes a careful balance

Drilling ban lifted

Environment slide shows

Nature's Best

'Nature's Best' awards
View the winning images that were featured at the Smithsonian National Museum of Natural History.

'Nature's Best' backyards

Guarding gorillas in Rwanda, Congo

'Nature's Best' photos by youth

More from 'Nature's Best'

'Nature's Best' winners

Sea turtle help -- and harvest

Threatened wildlife on 'Red List'

‘Worst Polluted’ sites on Earth

Greenland's melting ice

Photo features

Reuters	The Week in Pictures A bride goes fishing, while mini-Mahatma Gandhis compete on looks – just two of this week’s photo choices
AP	PhotoBlog View and discuss the pictures and issues that caught our eyes.