According to connoisseurs, the tastiest of coffee beans come from the Coffea arabica shrub, a fragile weakling that is susceptible to diseases and pests. And climate change isn’t making things any easier for the plant. An article in Chemical & Engineering News (C&EN), the weekly newsmagazine of the American Chemical Society, reports that although coffee producers and scientists agree that C. arabica is under siege, they don’t agree on what to do about it.