In honor of Earth Day (today, that is), Google's announcing another wave of its Giving through Glass program for non-profit organizations. The program, originally launched late last year, equips groups including the World Wildlife Fund and Give Directly with Google's wearable computer, with the goal of "bringing more transparency to philanthropy." Now, Mountain View is looking to partner with another five nonprofits -- submissions are open today through May 20th, and the selected organizations will win a $25,000 grant in addition to Google's hardware. Nonprofits can head here to apply, and everyone can head past the break to check out a WWF researcher using Glass while tracking rhinos in Nepal.