Green Science is the application of eco-friendly thinking to scientific disciplines. Learn about global warming, pollution and other impacts on nature and the planet, plus what we can do to combat them.

How has Earth Day evolved?

Earth Day 1970 didn't have the low-key feel of today's celebration. It was a time for protest -- some of it violent. How did Earth Day transform from a day of dissent to one of public service?

1-10 of 215
1-10 of 215
  • Most Popular