Bloomberg: Call it the invisible spill.
You cant see it, but its there -- a steady stream of natural gas seeping out of the pipe casing in a well in Southern California that may spew as much greenhouse gas into the air as a half-million cars do in a year. Pipeline operator Sempra Energy says it may take three to four months to plug.
Using the same tactic that eventually ended the massive 2010 oil spill in the Gulf of Mexico, the company is boring a well thatll intercept the damaged one to stop the...