Stabilizing greenhouse gas concentrations at 550 ppm -- which would invoke a rise in temperature of about three degrees Celsius -- would require energy emissions to rise no higher than 33 gigatons and would need to fall in the longer term.
In time they buried some 380, 000 miles of pipelines throughout the United States, which now handle 63 billion cubic feet of natural gas and 20 million barrels of crude a day, removing a crucial variable from the supply chain and stabilizing markets.