Buildings can be big polluters: 70 percent of the world population will live in cities by 2050, adding 40 percent to the current world building stock. As energy-efficient structures develop in growing countries, the U.S. can help stay competitive by retrofitting its existing buildings. Plus, improving building efficiency can contribute to reductions in global CO2 emissions from buildings by 83 percent below business-as-usual by 2050, reports the World Resources Institute.

We are well on our way to creating a cleaner, smarter energy future fueled by efficiency trends in three important arenas: people, places, and partnerships.

Source: 3 Reasons We Can Feel Good about Where Energy Efficiency is Headed