Thursday, April 22 marks the 40th anniversary of Earth Day and the environmental movement is stronger than ever. April is a great time to enjoy the social nature of Earth Day celebrations, so this week's tips will focus on group activities.
Tip #3: Celebrate John Muir's Birthday
Sierra Club founder John Muir was born on April 21, 1838. To celebrate the famous conservationist's 172nd birthday, you could friend him on Facebook , visit the John Muir National Historic Site , or attend a Muir symposium . We're betting that if Muir were alive today, he'd spend the day outdoors , exploring the earth's wild places.
Tell us: How will you celebrate John Muir's birthday?