Hilton, Marriott, hotel giants get in bed to count carbon | GreenBiz.com

via Diigo http://www.greenbiz.com/blog/2013/06/12/hilton-marriott-hotel-giants-get-bed-count-carbon?mkt_tok=3RkMMJWWfF9wsRokuaXIZKXonjHpfsX56uotWaK2lMI%2F0ER3fOvrPUfGjI4DTcdgI%2BSLDwEYGJlv6SgFSLHEMa5qw7gMXRQ%3D