By switching to green power, cities and towns across the country are taking a leading role in taking action against climate change. Green power is electricity that comes from a subset of clean, renewable resources like solar or wind power. Many communities have discovered these clean sources of energy are important tools in cutting their carbon footprint, supporting a growing domestic clean energy economy, and better protecting our air and public health.

Today, fossil-fueled power plants are the largest source of greenhouse gas emissions, contributing to a third of the U.S. total emissions. Most electricity generated today comes from fossil fuels but a small and growing percentage is generated using renewable sources. Since President Obama took office, wind energy has tripled and solar has grown ten-fold. In 2015, a full 60% of the new energy that gets added to our electrical grid will come from wind and solar. The costs have come down, too.

Our Green Power Partnership tracks trends in voluntary green power usage. Not only have we seen steady growth in local government partners (135 and counting!), but more and more often we’re seeing that local governments, businesses, and residents are voluntarily joining together to use green power at levels that earn the distinction of an EPA Green Power Community.

EPA Green Power Communities both large and small are proving they can have a big impact by using green power. For instance in Evanston, Illinois, the residents and businesses and the local government collectively use more than 228 million kilowatt-hours of green power annually, making up more than 30 percent of Evanston’s total electricity usage. The local government runs on 100 percent green power and generates power from the Evanston Water Treatment Facility’s rooftop solar energy system. Washington, D.C., is the largest EPA Green Power Community in terms of total green power usage, with more than one billion kilowatt-hours of green power being used by District residents, businesses, institutions and government entities. Collectively, green power now supplies more than 12 percent of total electricity use in the District.

Green Power Communities are using green power to support their economic and climate goals. Oak Ridge, Tennessee, set an ambitious goal of reducing the community’s greenhouse gas emissions 30 percent by 2030 from 2004 baseline levels. The city launched a community challenge to encourage greater participation in their local renewable energy program, resulting in community-wide green power use of 5.5 percent, and a participation rate nearly three times the rate at the start of the challenge. The City of Beaverton, Oregon, purchases enough wind energy to power all of its facilities and operations and also invests in on-site generation, with a solar array on its main library building. The Beaverton City Council recently approved the construction of a 433 kW solar photovoltaic array, which is expected to provide approximately 55 percent of the facility’s annual power needs.

Our proposed Clean Power Plan seeks to build on this trend. Our proposal identifies tailor-made carbon pollution reduction goals for each state, but it’s up to states to choose their own low-carbon path to get there. One clear choice is to use low or zero emission sources like wind and solar. And thanks to the many cities and towns that have already blazed the trail and are currently building and using more renewable energy, we know this shift can be made.

So when you see that windmill farm or big solar array, you can feel good knowing that some of the energy used in your community is coming from homegrown, clean, sources that help protect our climate for generations to come.

And, I’m happy to report that we run on 100 percent green power!