Tequila (Spanish ) is a regional specific name for a distilled beverage made from the blue agave plant, primarily in the area surrounding the city of Tequila, northwest of Guadalajara, and in the highlands (Los Altos) of the north western Mexican state of Jalisco. Although tequila is a kind of mezcal, modern tequila differs somewhat in the method of its production, in the use of only blue agave plants, as well as in its regional specificity. The red volcanic soil in the surrounding region is particularly well suited to the growing of the blue agave, and more than 300 million of the plants are harvested there each year. Agave tequila grows differently depending on the region. Blue agaves grown in the highlands region are larger in size and sweeter in aroma and taste. Agaves harvested in the lowlands, on the other hand, have a more herbaceous fragrance and flavor. Mexican laws state that tequila can only be produced in the state of Jalisco and limited municipalities in the states of Guanajuato, Michoacán, Nayarit, and Tamaulipas. Tequila is recognized as a Mexican designation of origin product in more than 40 countries. It is protected through NAFTA in Canada and the United States, through bilateral agreements with individual countries such as Japan and Israel, and has been a protected designation of origin product in the constituent countries of the European Union since 1997. Tequila is most often made at a 38–40% alcohol content (76–80 U.S. proof), but can be produced between 31 and 55% alcohol content (62 and 110 U.S. proof).