Challenge.gov allows Federal agencies to post rewards for whoever provides the best solution to a tough problem.

WHITEHOUSE: Startup America Policy Challenge: Tapping Citizen Solvers to Drive Innovation | The White House

The Environmental Protection Agency, together with other federal, state, local, and tribal agencies, developed AIRNow.gov, offering the public daily Air Quality Index forecasts and real-time Air Quality Index conditions for over 300 cities across the country as well as links to detailed state and local air quality cites.

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This helped lead to the launch of Challenge.gov, a one-stop clearinghouse that agencies can use to mount their own challenges.

WHITEHOUSE: Unleashing Innovation & Deepening Democracy Through Prizes | The White House