Healthcare organizations are in the business of supporting human health. Yet the irony is that health care organizations, and the hospitals they operate, are no small players in contributing to climate change. Hospitals account for 8 percent of greenhouse gas emissions in the U.S. They spend $5.3 billion on energy every year, and use twice as much energy per square foot as traditional office space. They generate more than 2 million tons of waste per year. And they are among the top 10 water users in their communities, with some facilities using up to 700,000 gallons of water per hospital bed per year.