Tackling climate change is a daunting challenge. What can one person do about such a big issue? We think you'll be surprised.

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We started One Change and Project Porchlight because we believe that every small change adds up. The first thing we can all do to help build a more sustainable environment is to start making more conscious choices about how we use energy. The Project Porchlight campaign shows that even changing one light bulb can make a huge difference if enough people do the same.

But there's so much more we can do than just changing our light bulbs. Volunteering, talking to friends, making other energy-efficient choices; it all makes a difference. The pages in this section describe in more detail some of the many things you can do to help us build energy-conscious, environmentally-sustainable communities.