#Occupy Wall Street interrupted regularly scheduled corporate Earth Day programming, and offered a glimpse of the grassroots environmental activism the event was originally about.

Festivities at the Earth Day celebration on the National Mall continued in spite of miserable weather.

Festivities at the Earth Day celebration on the National Mall continued in spite of miserable weather.

While we loved Alec Baldwin’s narration of the U.S. version of Frozen Planet, there’s always something special that happens when Sir David Attenborough narrates and nature documentary.

TreeHugger asked some of the Web’s best environmental writers to share their wishes for Earth Day. Here’s what they said.

Track your home energy consumption and get suggestions for saving energy (and money) with this new iPad app, now free until Earth Day!

California’s sustainable wineries and vineyards launch the first month-long Earth Day celebration with special green events.

This Earth Day a billion people around the world are pledging one act of green to mobilize people around the world on behalf of the planet.

In time for Earth Day, a heartwarming film about an orphaned chimp leads to an unlikely bond, raising both awareness and hard cash.

An initiative to stop selling red-rated seafood by 2013 had been launched a year early and will go into effect on Earth Day 2012.