ScienceDaily: If the U.S. healthcare system were a country, it would rank 13th in the world for greenhouse gas emissions, according to new research. The study, published June 9 in PLOS ONE, quantified previously unreported environmental and public health impacts of the nation's healthcare sector. The U.S. healthcare system, the most expensive in the world, uses vast amounts of energy in the form of heating, electricity, and energy-intensive goods and services. It has been estimated that the healthcare sector...