What's In My Food!? Challenge: Creating a healthier world by quantifying the benefits and harm of every bite of food you take.

Seawater Desalination Challenge: A competition to develop a new paradigm for desalinating seawater with a goal of 10x cost reduction.

Clean Air in México City: For more than 30 years the air quality in México City is getting worse, now is your opportunity to make a solution.

Operation Methane Harvest: Reverse global warming through innovation. Figure out how to harvest Arctic methane before more of it is released into the atmosphere