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Reduce global warming by taking quick & easy challenges.
Compete with others in your area and around the world.

View Some Real Challenges » Take a challenge

Challenges are simple actions you can take to prevent climate change. A new Featured Challenge is published every few weeks.

View Rally Impact Map » See your impact

2,110 Rallyers have already reduced over 158.42 tons.


The Impact Map shows the people and action in your town.

View Leading Cities & Teams » Team Up and Compete

Over 170 teams of company colleagues, friends, and school-mates are competing now to lead the community in CO2 reduction!

Accept this Challenge
Featured Challenge

Recent Activity

Kevin S. Kevin S. (331 lbs) accepted "Leave Your Car At Home", reducing CO2 by 4 lbs so far.
kanitw kanitw (0 lbs) accepted "Air-out Your Fridge", reducing CO2 by 0 lbs so far.
bballlover bballlover (1.05 tons) accepted "Change a Few Bulbs ", reducing CO2 by 2 lbs so far.
goodlookinghotshot_06405 goodlookinghotshot_06405 (13 lbs) accepted "Right Now, Less Cow", reducing CO2 by 13 lbs.
scilenti scilenti (50 lbs) accepted "Air-out Your Fridge", reducing CO2 by 0 lbs so far.