Do you believe in the power of the individual to change the world? Earth Day Network’s A Billion Acts of Green campaign aims to harness the power of millions of individuals, businesses and other organizations through pledges to live and act sustainably in specific ways. Acts range from riding a bike instead of driving to retrofitting a workspace to use renewable energy, as well as organizing or participating in an Earth Day event.

In all, more than 45 million acts have already been pledged, including large-scale initiatives such as community beach cleanups, greening schools and tree planting in 16 countries. The goal is to prompt 1 billion large and small acts by the start of the global 2012 Earth Summit in Rio de Janeiro.

Together, these acts steadily build commitments to measurably reduce carbon emissions and support sustainability. When millions of individuals and groups join in local Earth Day events and vow to follow through on their own pledges to better their environment, the impact can be huge.

“People sign the Billion Acts of Green petition with their green actions,” says Earth Day Network President Kathleen Rogers. Local Earth Day events work to get the ball rolling.

Register your pledge today at EarthDay.org and share word of your green act at any of these local Earth Day 2011 events.