Popular Prizes
- Greywater Recycling Challenge $260 Provide the incentive for communities to become greywater friendly.
- Automotive X Prize $100 Design, build, and sell super-efficient cars that people want to buy.
New Prizes
- Automotive X Prize $100 Design, build, and sell super-efficient cars that people want to buy.
- Greywater Recycling Challenge $260 Provide the incentive for communities to become greywater friendly.
Recent Proposals
- Green Generator Challenge Portable electricity generator powered by readily-available fuel(s) that runs as clean as a car.
Featured Prizes
There are currently no featured prizes.
