Leon, Guanajuato, Mexico

Leon is the most populous city in the Mexican state of Guanajuato, making it the fourth-most populous municipality in Mexico. Leon has a strong leather industry, offering shoes, boots, belts, jackets, and other leather accessories to national and international markets. It is also considered one of the most environmentally friendly cities in Mexico, in part because of integrating a network of bike lanes into the SIT system. In March 2012, it received an award as "City Water Champion", mainly due to great progress in the areas of sanitation, wastewater reuse, and energy cogeneration from biogas.