Mayor’s Carbon Reduction Challenge

presented by


From October 23 – 30, join the Mayor’s Carbon Reduction Challenge and fight climate change, form new low-carbon habits, and compete for great prizes! Buzz when you complete sustainability actions in the app to help reach the goal of reducing Austin’s greenhouse gas emissions by 50,000 pounds.

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Want to Play?

1. Download Rethink/

You’ll compete using the app, plus it’s the best way to go green in Austin.


2. Join the Challenge

Find the Mayor’s Challenge in the Challenge section (via the 2nd icon from left in tab bar at bottom on iOS or the nav drawer in top left on Android) and then Join!

4. Buzz Away

Challenge runs from 10/23 at 9:00 a.m. – 10/30 at 12:00 p.m. The most points win, so get out there and Buzz by going green.

Great Prizes!

We’ll pick five (5) winners to be awarded some great prizes! See the Challenge Info section in the app for details and eligibility.

Thanks to our Sponsors

Austin Office of Sustainability

Rethink/ has hundreds of sustainable achievements

Learn how each one helps make the planet a better place.