The "three original species" of coffee

The "three original species" of Coffee among the many plants on the earth, there are at least 40 species of the genus Coffee, but the more practical cultivated species are the so-called three original species, namely, Arabica, Robustra, and Liberica, and now this order is the order of their quality. The Arabica species has the best fragrance, and its caffeine content is only half that of the Robusta species. At present, the output of the Arabica species accounts for about 70% to 80% of the world's total output, while the Robusta species is resistant to high temperature, more rain and less rain. The adaptability is strong, the cost is low, and the output is also 20% to 30% of the total output. Liberika has poor aroma and bitter taste, except for producing countries and a small number of Europeans. It's not popular.