Design for sustainability?

What does it have to do with design?
The term sustainable design is often used interchangeably with related terms such as eco-design or design for environment, or green design (used less these days). This is because sustainable design evolved from the attempt to incorporate environmental considerations into design.
Design is utterly crucial to moving towards a more sustainable future - by rethinking how we deliver products and their benefits without decimating the world around us, or compromising the well-being of others (now or in the future); sustainability is a key to enhanced performance and greater competitiveness.
http://www.designcouncil.org.uk/About-Design/Business-Essentials/Sustainability/

So really what is meant by this is, moving design forward so that new designs take the environment into consideration and the effects of that new design on the environment.