On June 2, the U.S. Department of the Interior blocked oil and gas leasing for the next 20 years within a 10-mile radius of Chaco Canyon – the site of a Puebloan civilization in now-northern New Mexico dating back over a millennium. Despite some support from people within the Pueblo tribes and Navajo Nation which surround the land, the vast majority of Navajo leaders have opposed these drilling restrictions. It’s essential that climate advocates hear them out.