(CNN) - The Capitol is revamping its energy supply.
The Capitol power plant will use natural gas as the primary fuel source for steam used at the compound to heat buildings and water, terminating its coal usage unless needed for emergency backup, according to a statement released by Democratic leaders of the House and Senate Friday.
House Speaker Nancy Pelosi and Senate Majority Leader Harry Reid claim the switch will improve DC air quality and reduce Congress's carbon pollution impact, serving as an example for cleaner fuel usage across the United States.
"The Congress of the United States should not only be a model for the nation, but also a good neighbor," said Pelosi. Senate Majority Leader Reid echoed the speaker's statement saying the "switch to cleaner burning natural gas shows that the House and Senate are leading by example in reducing our emissions."
The Capitol architect in charge of the switch cited that the complex will revert back to coal usage in "abnormally cold conditions" or in the case of equipment outages.