Just as the power industry turned toward lower priced natural gas and away from dirtier coal, there are signs that trucks and trains are looking to lower priced liquefied natural gas (LNG) to replace diesel-powered vehicles, but there are challenges.
Apr 29, 2013 The New York Times - Energy & Environment
Delhi’s unpleasant pollution predicament, and its ensuing health consequences, are causing environmentalists, doctors and local officials to grow increasingly alarmed.
Jan 1, 2013 The New York Times
The city still known for its smog will not have its buses to blame - the last of its diesel-fueled ones retired Jan. 12 in a celebration. All but 7 of the 2,221 buses will be compressed-natural-gas powered; electric and gas-electric the remainder.
Jan 13, 2011 Los Angeles Times: Environment