This low-cost wearable air monitor detects hundreds of environmental contaminants.

Grantas plans to make cosmetics with natural ingredients in 100% biodegradable packaging.

This team will develop a toolkit to allow young professionals to advocate for environmentally-friendly 401(k) retirement plans — encouraging employers to embrace socially responsible asset management.

4 Beez International teaches a curriculum in sustainable living, fosters community building, and provides eco-alternative solutions for agriculture and energy.

This team is building a water faucet attachment that calculates how much water a user consumes and wastes — and makes that data accessible, so that over time people are encouraged to use less water.

Floe is an environmentally-friendly, safe, and cost-effective solution to prevent extensive water damage caused by ice dams on roofs in the winter. Currently, it costs an average of roughly $11,000 per building to clean up flooding, remove molding, and replace ruined ceilings, walls, floors, and roofs — but Floe aims to offer a better solution.

Greater Good Solar finances solar installations for low-income communities and sends a portion of the profits to education and green jobs training in those communities.

Hand Me Up is a children's secondhand marketplace that scales informal exchange networks like hand-me-downs.

agriCORE (previously Soil Samplers) makes field-ready soil driers and soil sample extractors.