Government regulations forced the Yup’ik to give up their semi-nomadic existence. Now, the land where they settled is vanishing.
In Oregon, a cluster of lakes is drying up — with dire impacts for the millions of migrating birds that survive off them.
In Colorado’s oil- and gas-producing counties, science teachers broach a thorny subject in their own backyard.
California, Arizona and Nevada are back in negotiations about the dwindling Colorado River water supply.