By Lucie AUBOURG After a catastrophic wildfire that killed more than 100 people in Hawaii, eyes have turned toward an unexpected culprit: invasive grass species that have spread massively over the archipelago for decades, serving as the perfect fuel. Drought-resistant, capable of invading difficult terrain, and gradually muscling out local species, they are also a growing threat in the western United States, where devastating fires are increasing. “Invasive grasses are very ignitable. They change the […]