A new study estimates that a staggering four billion people experience water shortage for at least one month out of the year. This is far more than previously thought, researchers say.
Climate change, land use and population growth are threatening the availability of water sources in the Himalaya Mountain basins.
With heavier rainfall sweeping through the African savanna, one would expect to see more thriving populations of trees. However, it turns out trees' deep roots are actually disadvantageous and don't allow the plants to suck up abundant water resources.
California's Sierra Nevada snowpack is lower than it has ever been in the past 500 years – a result of the region's three-year long drought, which doesn't seem to be ending anytime soon, say researchers.