The Marcellus Shale that made Pennsylvania the nation’s second largest natural gas producer (only Texas produced more in 2020) also underlies upstate New York and several other states.. could supply U.S. consumers’ energy needs for hundreds of years..
They refuse to drill and use it.
https://www.api.org/oil-and-natural-gas/energy-primers/hydraulic-fracturing/marcellus-shale
https://freerepublic.com/focus/news/4101268/posts?page=15#15
410 Trillion cf. I suppose that would last a few years.