Doing laundry: That is how one thinker responded to the refugee crisis in Greece and the waste it creates. The result was a program that provides new arrivals with clothing and local workers with employment. Other stewards planted themselves between precious resources and seemingly unstoppable industrial forces—from a North Dakota pipeline to a Honduran dam to a Chinese river. Others turned pollution into art. In some cases, these thinkers paid a high price for their actions. Collectively, they were the sort of preservationists the world desperately needs.
