To celebrate planet Earth, many of us partake in practical and fun Earth Day activities. The day traces its history back a few decades.
When Ohio's Cuyahoga River caught fire that year, it was one of the country's most polluted rivers. The city's industrial revolution had taken its toll: The oil and debris clogging the river had ignited nearly a dozen times before, and the river had developed quite a local reputation. Some described it as thick and wreaking of oil and sewage.
But this time, the flaming river gained national attention, sparking an environmental movement that eventually inspired the Clean Water Act and prompted a small grassroots campaign to save the environment into a mainstream movement. That grassroots campaign, known as April 22, 1970, is now Earth Day.
If you're one of those millions planning to lend a hand in honor of Mother Earth, you may be wondering what exactly you can do. We've got 10 great ways to roll up your sleeves and get to work, whether you have five minutes, five hours or want to form habits that will last a lifetime.