Proof Eyewear has teamed up with The Nature Conservancy on their Plant a Billion Trees Campaign on Earth Day. For each eyewear purchase on Earth Day, April 22, Proof will donate to the cause. Nature Conservancy launched the campaign five years ago in an effort to restore Brazil's Atlantic Forest, which was near extinction due to pressures of urban expansion, agriculture, ranching and illegal logging. Through the “Plant a Billion Trees,” NC will reforest 2.5 million acres and connect more than 12 million acres in new forest corridors. Proof Eyewear made an appearance on “Shark Tank” on Friday, February 22, 2013. To watch the Dame Brothers pitching Proof Eyewear, visit http://abc.go.com/shows/shark-tank. Read more.