1 Hydropower is the most efficient way to generate electricity. 2  Modern hydro turbines can convert as much as 90% of the available energy into electricity. 3  The best fossil fuel plants are only about 50% efficient. ( 4 1). 5  In the U.S., hydropower is produced for an average of 0.85 cents per kilowatt-hour (kwh). World-wide, about 20% of all electricity is generated by hydropower. ( 2 1). 3  Hydropower provides about 10% of the electricity in the United States. ( 4 1). 5  The United States is the second largest producer of hydropower in the world.
Lincoln's Diagnosis: MEN2B. The Physical Lincoln shows that President Abraham Lincoln had an extremely rare disease called MEN2B -- multiple endocrine neoplasia, type 2B. MEN2B is a genetic disorder in which long-bones and nerve cells grow excessively. Without treatment, 100% of people develop thyroid cancer and 50% also develop a tumor in the adrenal glands.
President Reagan never understood mental illness. Like Richard Nixon, he was a product of the Southern California culture that associated psychiatry with Communism. Two months after taking office, Reagan was shot by John Hinckley, a young man with untreated schizophrenia. Two years later, Reagan called Dr. Roger Peele, then director of St. Elizabeths Hospital, where Hinckley was being treated, and tried to arrange to meet with Hinckley, so that Reagan could forgive him.