A survey of ecological principles as they apply to the interrelated dilemmas of overpopulation, pollution, the increasing consumption of natural resources, and the ethics of land use.
(they; apply; to the interrelated dilemmas of overpopulation, pollution, the increasing consumption of natural resources, and the ethics of land use)
they
apply
to the interrelated dilemmas of overpopulation, pollution, the increasing consumption of natural resources, and the ethics of land use