Short answers, pulled from the story.
Coffee is a beverage brewed from roasted, ground coffee beans, darkly colored, bitter, and slightly acidic. Its stimulating effect on humans comes primarily from its caffeine content, though decaffeinated coffee is also commercially available.
The earliest credible reports of coffee drinking pertain to its use among the Sufis of Yemen in southern Arabia in the middle of the 15th century. Sufi circles used coffee to stay awake for their religious rituals, and by the late 15th century the practice was well established in Yemen.
In 2023, Brazil was the leading grower of coffee beans, producing 31% of the world's total, followed by Vietnam as a secondary producer. Brazil became the largest producer in the world by 1852.
Arabica, from C. arabica, is generally more highly regarded and makes up about three-quarters of coffee cultivated worldwide. Robusta, from C. canephora, tends to be bitter with less flavor but better body, and contains about 40 to 50 percent more caffeine than arabica.
One common story credits US Secretary of the Navy Josephus "Joe" Daniels, who banned alcohol on navy ships during World War I, leaving black coffee as the strongest drink aboard. The story may be apocryphal, since its first written account appeared in 1930. Other explanations trace the name to jamoke, from mocha java, or to coffee as the drink of the average Joe.
Nordic countries are the highest coffee-consuming nations measured per capita per year, with Finland the world's highest at 26.45 lb. Norway follows at 21.82 lb and Iceland at 19.84 lb.
On average it takes about 140 L of water to grow the coffee beans needed to produce one cup of coffee. Producing 1 kg of roasted coffee in Africa, South America, or Asia requires 26400 L of water.