nning all the way from the Canadian border to Mexico, there are vast areas where almost no trees grow. In this section of the country there are deserts, which receive as little as 12-13 centimeters of rainfall a year. Yet, west of the Sierra Nevada Mountains, there are places in which 250 centimeters of rain fall annually. It is one of the wettest places in the USA.
Hawaii, the 50th state, is a chain of over 100 islands, lying in the Pacific and stretching from southeast to northwest for 2,575 kilometers. The situation in Alaska is different. In those parts of the state which lie above the Arctic Circle, Alaska still is a land of icebergs and polar bears. Ice masses lie buried in the earth, which is permanently frozen land to a depth of 90 or more meters.
Natural resources include coal, copper, lead, molybdenum, phosphates, uranium, bauxite, gold, iron, mercury, nickel, silver, tungsten, zinc, petroleum, natural gas, and timber.
Natural hazards are a great deal of problems for the USA. Every year, they loose hundred millions of dollars, because of natural hazards. The USA is famous for hurricanes along the Atlantic and the Gulf of Mexico coasts and tornadoes in the Midwest and southeast; mud slides in California; forest fires in the west; flooding.
Sometimes there are tsunamis, volcanoes and earthquakes happen. Earthquakes are very often in California.
Talking about environment, one should add that air pollution results in acid rains in both the US and Canada. The US is the largest single emitter of carbon dioxide from the burning of fossil fuels.
Water pollution from runoff of pesticides and fertilizers takes place here.
Animal and plant life in USA
Many species were hunted to extinction or near extinction, most conspicuou
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