The human population is actively modifying Earth’s atmosphere, biosphere, hydrosphere, and lithosphere through resource consumption and the use of technology. Researchers have recognized that the number and magnitude of the environmental problems now facing the Earth are directly correlated to the size of the human population. Humans can influence natural phenomena and processes at the local, regional, and global scale. The various human populations found on our planet also vary greatly in terms of affluence, level of education, and access to health care. The area of knowledge known as sustainable development tries to find solutions to the various social and environmental problems we now face.