Earth Day is an annual campaign celebrated throughout the world by millions of people. What began as a way to bring the environment onto the US national political agenda, Earth Day has evolved to become a global campaign to push awareness about environmental issues such as recycling, global warming and clean energy, and climate change. Earth Day 2011: A Billion Acts of Green® is this year's theme. A Billion Acts of Green® invites individuals, corporations, and governments to pledge to live and act sustainably(1)
