From GreenSportsBlog:

The club’s greenness goes back at least to that division-winning season of 2007. Since then, Cleveland and Progressive Field have consistently been among Major League Baseball’s green leaders; installing a highly visible solar panel system on site, initiating the composting of organic waste, and adding on-site wind energy to the mix — among other environmentally-friendly measures.

Senior Director of Ballpark Operations Jerry Crabb accepted the award on the American League Champs’ behalf by saying, “The Cleveland Indians organization is honored to receive the Best Team On and Greenest Team Off Field recognition this year. While we came up just shy of achieving one of our Guiding Commitments to win the World Series, we also take a lot of pride in our green energy efforts which support our other organizational commitments to our Fans, Progressive Field and Community. Thus, it’s exciting for us to receive an award like this acknowledging all facets of our business.”