“Humankind is now the singular driving force behind the potential extinction of more than one million species….The modern world that we’ve built is filled with danger for wildlife. Roads and highways are virtual death traps for crossing animals. Population booms and the subsequent expansion of cities have fragmented delicate landscapes.” - Senator Tom Udall Read about the solution to saving animals and habitats on The Cleanest Line here: Photos: Joe Riis, Steven Gnam