Tuberculosis (TB) Tuberculosis (TB) Active tuberculosis (TB) is very contagious. The World Health Organization (WHO) estimates that one-third of the world's population is infected with the bacteria that cause TB.
With an average elevation of 6,800 feet, Colorado is the highest state in the United States. A mountain lake outside of the skiers dreamland of Aspen, Colorado. The US is bordered to the north by Canada and Mexico to the South. With 50 states of varied sizes, US is considered the largest nation in America.
The lowest point of 455 feet is at the Ohio River in Hamilton County. Nationally, the lowest point of 282 feet below sea level is found at Death Valley, Calif. Mt. McKinley, Alaska, at 20,320 feet is the highest point. Cleveland's elevation ranges from 571 feet to 1,050 feet. Here are the lowest and highest points for each state. Also: 1  Previous Statistical Snapshots.