Sugar is an important part of the human diet, making food more palatable and providing food energy. Sugars are found in the tissues of most plants, but are only present in sufficient concentrations for efficient extraction in sugarcane and sugar beet. Sugars are organic substances that burn easily upon exposure to an open flame. Because of this, the handling of sugars presents a risk for dust explosion. Granulated sugars are used at the table to sprinkle on foods and to sweeten hot drinks and in home baking to add sweetness and texture to cooked products. They are also used as a preservative to prevent micro-organisms from growing and perishable food from spoiling as in jams, marmalades, and candied fruits. After cereals and vegetable oils, sugar derived from sugar cane and beet provided more kilocalories per capita per day on average than other food groups.