What is the difference among "sustainable," "environmental," and "organic" architecture?
Sustainable and Environmental Architecture are the same thing; it’s the philosophy of designing and servicing to comply with the principles of social, economic, and ecological sustainability. Noise barriers, solar power, shading, passive cooling/heating, etc.
Organic Architecture is a philosophy of architecture which promotes harmony between human habitation and the natural world through design approaches so sympathetic and well integrated with its site, that buildings, furnishings, and surroundings become part of a unified, interrelated composition. An architecture that responds to the place it is suited in, for example Falling Water.