The geography of the United States is as diverse as it is big in area. From the Atlantic to the Pacific to the Gulf of Mexico, one finds mountain ranges, plains, forests, lakes, deserts, coral reefs, coastlines and just about every other type of environment. The country’s wildlife is also varied and abundant with thousands of species of plants and animals, both big and small.
The US is one of the largest emitters of carbon dioxide. This contributes to the country’s air pollution problems, such as acid rain, as well as global warming. Other environmental problems include freshwater and marine pollution from agricultural runoff of pesticides and fertilizers, and industrial discharge. Disposal of waste, including hazardous waste, also presents a number of environmental challenges.