Penstemon digitalis the plant that is named Dark Towers. The hybrid has tubular pink flowers that grow up to 1.5 inches tall, red foliage, and is 1.5 feet to 3 feet tall. Although Dark Towers is similar to Husker Red, its red foliage is darker than that of the Husker Red cultivar and has more height. It also stays red for a longer time in the summer. Dale Lindgren created and named both Husker Red and Dark Towers at the University of Nebraska in 1983. Lindgren decided to create Husker Red because of its purplish-red foliage. Penstemon digitalis Penstemon digitalis (foxglove beard-tongue,
Drug pollution Drug pollution Drug pollution or pharmaceutical pollution is pollution of the environment with pharmaceutical drugs and their metabolites, which reach the aquatic environment (groundwater, rivers, lakes, and oceans) through wastewater. Drug pollution is therefore mainly a form of water pollution. "Pharmaceutical pollution is now detected in waters throughout the world," said a scientist at the Cary Institute of Ecosystem Studies in Millbrook, New York. "Causes include aging infrastructure, sewage overflows and agricultural runoff. Even when wastewater makes it to sewage treatment facilities, they aren't equipped to remove pharmaceuticals." Most such pollution comes simply from the drugs having been cleared and