What are the most important concepts of sustainability in the built ?

REDUCE YOUR CURRENT CONSUMPTION OF NON RENEWABLE ENERGY SOURCES.

REUSE AND RECYCLE : TRY TO RECYCLE WASTE GENERATED.

GENERATE ENERGY LOCALLY TO MEET YOUR DEMANDS USING RENEWABLE SOURCES.

Considering climates and cultures, providing high performance buildings, designing adaptable buildings, and before all of them reducing CO2.

I think the most important aspect is to reduce energy consumption. this might happen starting from the design stage up to the maintenance of the built environment.

Converting energy sources into non traditional option like solar power, will change the course of energy dependency in eco friendly,

water recycling and rain water storing facilitates also contribute the sustainability factor