'''Sustainable design''' and '''sustainable technology''' are similar in concept to [[appropriate technology]] but broader, including both high technology and very low technology. Sustainable technology may be more expensive up front, but offers savings through efficient operation; or it may be cheaper up-front through simpler design. | '''Sustainable design''' and '''sustainable technology''' are similar in concept to [[appropriate technology]] but broader, including both high technology and very low technology. Sustainable technology may be more expensive up front, but offers savings through efficient operation; or it may be cheaper up-front through simpler design. |