LyrArc Article Gist
Everything you might want to know about coffee, where it comes from, how cultivation is changing with climate change and higher temperatures, and the effort to map the coffee genome. With higher temperatures the farming of coffee moves to higher altitudes in coffee growing countries in the tropics, but it is easier to cross breed the 124 varieties to produce a plant that can withstand the change in temperatures and one that can resist fungus. 

A coffee fungus and higher altitude rains destroyed much of the crop in Central America including Guatemala. This led to increased migration to Mexico and U.S. of farmers leading up to Mr. Trump's plan to have the National Guard of Mexico police Mexico's border with Guatemala. 

Coffee is a sensitive plant and needs cooler weather and water which is found more in the tropics. Growing it in California or in Italy makes it very costly leading to Frinj coffee being sold in California at $16 a cup.

Climate change could reduce the area where coffee can be grown by about 50% in the tropical countries from South east Asia to African countries such as Kenya, Uganda, Tanzania and Ethiopia, and in south America Colombia and Brazil, says Climate Institute, Washington DC based climate change experts.