Those are strong words...
"In 1630, the estimated area of U.S. forest land was 1,023 million acres or about 46 percent of the total land area."
"In 2012, forest land comprised 766 million acres, or 33 percent of the total land area of the United States."
Source: US Department of Agriculture
https://www.fia.fs.fed.us/library/brochures/docs/2012/Forest...