Throughout the book Boll and his colleagues continuously stress the significance of the many important contributions that psychology has made to medical science's knowledge and understanding of the causes and consequences of physical and emotional illness.
There are more than 60 dams in the Columbia River watershed in the United States and Canada. Tributaries of the Columbia River and their dammed tributaries, as well as the main stem itself, each have their own list below. The dams are listed in the order as they are found from source to terminus.
Beginning high in the mountains of southeastern British Columbia, the Columbia River flows 2,000 kilometers (1,243 miles) through alpine and subalpine environments, montane forests, lava fields, semiarid grasslands, and low-elevation rainforests before entering the Pacific Ocean.