A TEST OF ENDURANCE

摘要

Coal is US's most important source of power. It generates more than 43% of all electric utility and industrial power produced in the country. In 2010, the country's 1400 coal mines produced more than 1 billion short t of coal. Given that it can take 3000 gal. of water to extract, process, transport, store and dispose of every tonne of coal, safely and efficiently managing the industry's process and wastewater streams plays an important role in the economics and environmental performance of coal production and use.