Indigenous Australians strategically burn land in a practice known as cool burning, in which fires move slowly, burn only the undergrowth, and remove the build-up of fuel that feeds bigger blazes. The Nawarddeken people of West Arnhem Land, Australia, have been practising controlled cool burns for tens of thousands of years and see fire as a tool to manage their 1.39 million ha homeland. Warddeken rangers combine traditional knowledge with contemporary technologies to prevent wildfires, thereby decreasing climate-heating carbon dioxide.