People love their cuppa joe so much that coffee stands as the second-most valuable legally traded commodity on the planet behind oil. Unfortunately javaphiles may need to start seeking other sources for their caffeine kick before long, as the sweeping impacts of anthropogenic climate change spell major trouble for coffee. They require a tropical climate to grow and thrive, and thus all of the world's leading coffee-producing countries are located in or near the tropics. This includes Brazil, which is the world's leading coffee producer, with a crop more than three times that of second-place Indonesia. One thing all of these countries have in common is that climate change is taking an extreme toll, particularly in rising temperatures and extreme weather events like droughts and floods.