And third, other species provide ecosystem services without which human survival is not possible. These services include maintenance of the gaseous composition of the atmosphere, regulation of the hydrological cycle, pollination of crops, control of the vast majority of pests, and the generation and maintenance of fertile soils. . Problem is, there are reasons that these acres appear empty. Many are devoted to producing food or other materials we need to live. These acres supply a person with food, fiber and other resources as well as capacity for waste assimilation and disposal.
Some land is empty because it has no carrying capacity.
The Sahara desert is another example. And there are deserts and mountain ranges in the USA that contain few people because, without the expenditure of huge amounts of money, these places cannot sustain human life. . So, there must be a very large overlap between these two groups and, thus, we might expect that many Americans sense that their environment is adversely impacted by massive immigration. The two major parties have chosen to ignore rapid, immigration-driven, U.S. population growth, in particular, its environmental implications. Working hand in glove with the politicians are the media.