In general, the coca belt is expected to be hotter and drier in the coming century. Average temperatures could rise by as much as 4 degrees Celsius (7.2º Fahrenheit) by 2100, the U.N.’s Intergovernmental Panel on Climate Change reported in late March. Areas closer to the equator are expected to get more rainfall, while those to the north and south are expected to get less. The glaciers of the tropical Andes are receding, and the ranges of many plants are shifting upward toward cooler, higher elevations, the IPCC noted.
But the coca bush is a tough plant, one that’s likely to adapt to the expected changes, say several scientists who’ve studied cocaine.
“Coca is kind of unique, because it’s got a very heavy wax cuticle, a layer on the leaves,” said Charles Helling, a former soil chemist at U.S. Department of Agriculture who took part in American anti-drug efforts. “So that tends to protect it from water loss. It’s a pretty hardy shrub. It’s actually a lot hardier than a typical crop plant.”