April 22, 2006 Today is Earth Day, when millions of people worldwide will participate in events to show their concern for the planet's environment and natural resources. The official web site lists an array of ways in which you can meaningfully involve yourself and your family and Yahoo! has also assembled a comprehensive microsite that helps people take simple steps to slow climate change. Environmental experts warn that greenhouse gas emissions will lead to disastrous consequences unless the earth's inhabitants make lifestyle changes.