You are using an unsupported browser
You are currently using an unsupported browser. We recommend using a newer browser such as Mozilla Firefox, Google Chrome, Safari, or Microsoft Edge.

×

Open Challenge Closed
Submissions and voting for the open challenge closed on December 23, 2020. Winners will be notified in January 2021!

×

{{challengeData[2].title}}

How to Participate?

ABOUT THE CHALLENGE

Read the detailed Problem Brief Got Questions? Contact Us

Participating Cities

Creative Commons License

 This work is licensed under a

 Creative Commons Attribution-ShareAlike 4.0 International License..