Scientists say the beetles released on Southwest riverbanks could tame the water-sucking tamarisk trees.
Researchers hope controlled high flows from Glen Canyon Dam will help restore natural habitat.
Population, pollution, and climate put the squeeze on potable supplies – and private companies smell a profit. Others ask: Should water be a human right?
It's a 50 percent possibility, a new Scripps study finds, which would squeeze water supplies in Arizona, California, Nevada, and New Mexico.