February 1, 2015, 7am PST
The city of Burlington, largest in the Green Mountain State, is the only city in the U.S. to provide electricity from entirely renewable sources, notwithstanding criticism from some environmentalists. PBS Newshour Weekend investigates.
October 27, 2009, 8am PDT
The National Academy of Science has released a report showing that health effects from burning fossil fuels cost the economy about $120 billion a year. Global warming was not included due to uncertainty, so it's focused mostly on air pollution.
The New York Times - Environment