WaterSense, a subset of the US EPA, puts on sustainability webinars that have different focuses.
Habitat for Humanity has resale stores care Habitat ReSale where used building materials, furniture, etc. can be bought at a cheap price
Energy Star: Equipment tax credits for primary residences. Includes tax credits associated to residential energy property costs and energy efficient improvements that qualify for a tax credit. **new construction and rentals DO NOT apply must be an existing home AND their principal residence. EXPIRES December 31, 2021