The program isn't the first to offer money in exchange for using less water. But it comes at a critical time for the river.

YouTube video by Jake Broe Overflow

For reasons still unknown, Earth's energy imbalance is rising much faster than models can account for. Now, scientists are calling for long-term investment in monitoring capability, so that they can m...

Charles David Keeling first documented how the gas buildup in the atmosphere contributes to the warming planet. His son says proposed cuts to NOAA threaten critical scientific research.