News
As Water Levels Drop, the Risk of Arsenic Rises
In Colorado’s famed San Luis Valley, residents who rely on well water are grappling not only with a shortage amid drought, but questionable quality of the water coming out of the ground.
By Melissa Bailey, KFF Health News
When John Mestas’ ancestors moved to Colorado over 100 years ago to raise sheep in the San Luis Valley, they “hit paradise,” he said.
Related Knowledge Center: Climate science
State of Play
What began as a theory in the 1890s — that industrial emissions of carbon dioxide could increase global temperatures — had progressed to a scientific fact a century later. Scientists across a range of disciplines are studying the impact of the still-growing concentration of carbon dioxide and other so-called “greenhouse gases” in the atmosphere as they call for industrial and governmental policies to slow, then halt, the warming of the planet.