Does Earth Day matter?

by Molly Bloom, Minnesota Public Radio

Earth Day turns 40 on April 22. But a lot has changed since 1970. Environmental Studies programs are commonplace at colleges. The NYSE is now carbon neutral. LEED Certification wasn't launched until 1998 and now the new Target Field is the greenest ballpark in the U.S. Sources from our Public Insight Network talk about if and why Earth Day matters to them and how this has changed over time.

Share your insights here.