coffee

Why does coffee make you pee? The science of caffeine as a mild diuretic, tolerance, the dehydration myth, and how it compares to alcohol and water.

Brazil ships the most coffee by volume and value. Switzerland and Germany rank high because they re-export processed coffee, and Colombia and Ethiopia earn more per tonne than the volume leaders. Here is how the ranking works and who keeps the money.

Brazil produces nearly 40% of the world's coffee — more than the next three countries combined. Vietnam is the world's top Robusta producer. Ethiopia is coffee's birthplace. Global coffee production is worth $50 billion at origin but $460 billion at retail — the biggest markup in agriculture. Here's the full coffee production ranking.

Coffee rankings depend on the year, population denominator, and whether they measure beans, cups, or caffeine. Learn how to compare country consumption without mixing those measures.

Coffea arabica survives in a narrow climate band that is shrinking fast. Here is the science behind why your morning cup is under threat — and what the coffee industry is racing to do about it.

Caffeine is the world's most consumed psychoactive drug. It boosts alertness, has real health benefits, and is dangerous in excess. Here's the science of caffeine and how much you can safely drink.