Combustion at elevation
Combustion at elevation In total 6% of the world’s population, that is 474 million people, live in 20 cities above 1,500 meters (4,924 feet) above sea level. Cities above 1,500 meters by order of altitude include La Paz Bolivia (3,869 meters, 12,693 feet), Quito Ecuador , Toluca Cochabamba Bolivia , Bogota Colombia , Addis Ababa Ethiopia , Mexico City Mexico , Xining China , Sana’a Yemen , Puebla Mexico , Kunming China , San Luis Potosí Mexico , León Mexico , Kabul Afghanistan , Nairobi Kenya , Denver United States , Medellín Colombia , Johannesburg South Africa , Srinagar India , Lanzhou China (1,594 meters, 5,229 feet).