Green Houses p1 “Ecological Building Designs” This is a non-profit survey of Green Houses, or Homes Designed Green or Built of Ecologically-Sustainable Materials. There are many forms of Alternative / Green or Sustainable or Environmental or Eco-Friendly architecture. Forms include: Earthships, Earth-Shelter, Passive/Active Solar, Recycled-Reused, Bio-Degradable Temp, or Perma-Sustainable etc… x