In five of the past 11 years, parts of the U.S. electrical grid have been hit by blackouts, shut-offs or close calls during cold weather. Experts say one reason is a recurring shortage of natural gas.
In five of the past 11 years, parts of the U.S. electrical grid have been hit by blackouts, shut-offs or close calls during cold weather. Experts say one reason is a recurring shortage of natural gas.