In Arizona v. Navajo Nation, tribal attorneys argue that, by not providing their nation with sufficient water, the United States has breached a trust obligation related to treaties settled in 1849 and 1868.
A searing heat wave in parts of southern Asia in April this year was made at least 30 times more likely by climate change, according to a rapid study by international scientists released Wednesday.
Arizona is home to more than 65 species of butterfly, and while populations have declined over the last four decades — victims of climate change, drought and urbanization — the botanical garden in central Phoenix stands out as an important refuge for the insect pollinators.
