According to the report, rising temperatures encourage the growth of fungi and pests, which could make half of the world's coffee farming land useless.
It's happened before (almost): unusually high temperatures and high-altitude rains through Central America in 2012 resulted in a wave of coffee leaf rust, affecting more than 50% of the crop. And coffee berry borer, a major pest originating in Congo, has now spread to places such as Tanzania, Uganda, and Indonesia due to hotter, wetter conditions.
"Without strong action to reduce emissions, climate change is projected to cut the global area suitable for coffee production by as much as 50% by 2050. By 2080, wild coffee, an important genetic resource for farmers, could become extinct."
As one who can't function without a good strong coffee every morning, all I can say is: thank goodness I’ll be DEAD by then!