It’s daunting to think about the damage we’re doing to our planet, and the harm it will do to our own health. But as our interview with Harvard’s Sam Myers (see "There is No Planet B") shows, solutions do exist. Some, like reducing carbon emissions from vehicles and power plants, are well known; others are less recognized. For example, livestock accounted for an estimated 15 percent of human-induced worldwide greenhouse gas emissions in 2005.