California Drought Natural, Not Man-Made

The drought parching the U.S. state of California is one of the worst on record. And although researchers say greenhouse gases likely made heat waves worse in Asia, Australia and Europe last year, climate change is probably not behind California’s troubles.   The last three years have been among the warmest and driest on record in the wet coast state, costing an estimated $2.2 billion in crop and livestock losses so far. A ridge of high pressure has blocked Pacific storms from...

© La Voix de l'Amérique - lundi 8 décembre 2014