When we hear the word “sustainability”, we sometimes inadvertently link it to renewable energy sources, reduction of carbon 
emissions, environmental protection, reduction in global warming, etc., but it’s a lot more than just that. In short, sustainability looks at protecting our natural environment, while driving innovation to meet our current needs.
http://blog.schneider-electric.com/energy-management-energy-efficiency/2017/02/23/sustainability-at-all-levels/