An ecohouse (or eco home) is an environmentally low-impact home designed and built using materials and technology that reduces its carbon footprint and lowers its energy needs.
This includes:
Glass that has two or three layers with gas in between to prevent heat loss
Solar panels
Geothermal heating and growing plants on the roof to regulate temperature, quieten the house, and to produce oxygen
A wind turbine for when there is wind, and a battery if not