I’m doing a project on advantages of eco-friendly houses and I need help. Can someone give me some features of these houses that are significantly environment-friendly? I already have -

1. Alternative flooring
2. Geothermal energy pumps
3. Alternative hot-water heaters

Also links would be good. Best answer available.

Alternative Flooring · Eco Friendly Houses · ecofriendly · features · Geothermal Energy · Hot Water Heaters · Houses · Pumps · Some