Man-made global warming has “affected Kenyan coffee production through unpredictable rainfall patterns and excessive droughts, making crop management and disease control a nightmare.” Joseph Kimemia, director of research at Kenya’s Coffee Research Foundation (CRF), told reporters that hotter temperatures and unpredictable rainfall are damaging his nation’s ability to grow coffee:
We have seen climate change in intermittent rainfall patterns, extended drought and very high temperatures. Coffee operates within a very narrow temperature range of 19-25 degrees (Celsius). When you start getting temperatures above that, it affects photosynthesis and in some cases, trees wilt and dry up. We have see trees drying up in some marginal coffee areas.
Global warming-related droughts, heat waves, and climate change are also damaging coffee production in top exporters such as Uganda, Brazil, Mexico, Peru, and Nicaragua, as growers are “being forced uphill to higher altitudes, at a rate of three to four meters a year on average, as temperatures rise.”