Don't think you can make an impact on our environment? Our Why Not Girl! of the Week Gina Murphy-Darling says that if we all make small changes, they'll make a big impact to the world.

The founder and host of Mrs. Green's World, a multi-media company based in Tucson, Arizona, Gina shares an update on the green initiatives she's spearheading as well as a recent trip to the White House that all happened because she said Why Not!

For more inspiring interviews, go to www.whynotgirl.com