While some will say things like comets, meteorites, dump land mass etc., others will talk about the planned obsolescence of products that cause more waste. . . but . . .
If it is a landfill, what is the landfill? We all agree that the landfill is somewhat unwanted to occupy space or resources that are finite.
The human race reproduces at a greater rate than ever, and although it is not the addition or subtraction of mass or atoms to the place, it is certainly to occupy space and resources that are finite. . . . Some people move around the world and are good for the planet, the environment, etc. . . They use their brains.
Some, on the other hand, are only a waste of space, and so marred by the system of education (indoctrination) and publicity, that they would consider them unwanted and occupying space and resources on a finite planet of space and resources.
So I would say that the land is becoming a landfill for these people. We should find another planet or moon to send to the human population. Then we would call that planet or the lunar earth that pours the ground. . . As it is now, however, there is no other place to overturn them, so here are, on earth, the dumb human dump.