By Eva Hershaw
St. Louis-based Arch Coal is the fourth US coal company to file for bankruptcy since July, as coal production slides to its lowest level in 30 years.
By Matt Smith
George Soros has pledged to invest $1 billion in renewables, but he recently purchased a million and a half shares in the two largest US coal companies.
Coal mines in the Navajo Nation are poisoning the air and water — and the companies that run them want to expand their operations.