The NYTimes magazine [1] ran a piece in 1996 says a 35 square mile landfill, 100 yards deep, will store all US trash until the year 3000. To put that in perspective, that's about 1 tenth of 1 percent of the range land currently available for grazing. I'm sure someone could find a corner in a desert somewhere for such a need if required.

[1] - https://www.nytimes.com/1996/06/30/magazine/recycling-is-gar...