CNBC - Catherine Clifford - FEB 17, 2023
Most of the U.S. electric grid was built in the 1960s and 1970s. Today, over 70% of the U.S. electricity grid is more than 25 years old, and that aging system is vulnerable to increasingly intense storms.
Also, the electric infrastructure in the U.S. was built to bring energy from where fossil fuels are burned to where the energy will be used.
But as humanity responds to global warming, renewable, zero-carbon sources of energy, especially wind and solar energy, are replacing fossil fuels. That requires a new transmission grid.
This story is part of CNBC’s “Transmission Troubles” series, an inside look at why the aging electrical grid in the U.S. is struggling to keep up, how it’s being improved, and why it’s so vital to fighting climate change.
The network of transmission lines that carry electricity across the U.S. is old and not set up to meet the anticipated demand for clean energy sources like wind and solar.
Currently, electricity generation results in 32% of carbon dioxide emissions in the United States, mostly from burning fossil fuels like oil, coal, and natural gas. Those fuels are transported and burned where electricity is needed. But inexpensive emissions-free sources of energy, like solar and wind, are only abundant in places where the sun shines or wind blows, and that’s not necessarily close to homes and businesses. Moreover, demand for electricity is going to rise as fossil fuels are gradually replaced for a whole host of other uses, such as electric vehicles and heat pumps.
Keeping the lights on and the air clean will require a lot of new transmission.
‘A double whammy’: Age and location
Most of the U.S. electric grid was built in the 1960s and 1970s. Currently, over 70% of the U.S. electricity grid is more than 25 years old, according to the White House. That creates “vulnerability,” the U.S. Department of Energy said in an announcement of an initiative included in President Biden’s Bipartisan Infrastructure Law to catalyze investment in the nation’s grid.