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.
Lincoln suffered depressed mood after major traumatic events, such as the death of Ann Rutledge in August 1835, the cessation of his (purported) engagement to Mary Todd Lincoln in January 1841 (after which several close associates feared Lincoln's suicide), and after the Second Battle of Bull Run.