From the age of two months to ten years, more than 90% of the cases of meningitis are caused by Hemophilus influenzae, meningococci, or pneumococci. Currently, infants can be vaccinated against H. influenza (group B) and N. pneumonia. Hemophilus meningitis is rare after the age of ten.
The Three Gorges Dam is the largest hydroelectric dam in the world. It is located in the middle of the tree gorges on the Yangtze River, the third longest in the world, in the Hubei Province of China. The project was approved by the Chinese government in 1992.
The Glen Canyon Dam impounds the Colorado River about 1 mi (1.6 km) northwest of Page in the narrow lower reach of Glen Canyon and 16.4 miles (26.4 km) upstream of Lee's Ferry. The dam is 710 feet (220 m) high from the crest to the foundations and has a crest length of 1,560 feet (480 m).