We have the potential to produce all of our electricity from clean energy sources. Today, we have the technology and the know-how to move beyond our dependence on polluting power plants by using clean, safe, and free renewable energy A clean energy future will rely not just on renewable energy, but also on better use of the energy we currently produce. By making the energy we produce last longer, or by increasing “energy efficiency,” we can avoid the need for new polluting power plants. We can increase energy efficiency by using available technologies that do the same amount of work but use less energy, like a computer that goes to sleep when it’s not in use.