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USA
Physical systems
The Climate is tropical conditions in south Florida and Hawaii to arctic and alpine conditions in Alaska and across the Rocky Mountains. 
Space
3,796,742 sq mi (9,833,520 km2)
Human systems
The United States has a mixed economy.
The main industries are petroleum, aircraft engines, Communication equipment and processed food.
The important export products are capital goods such as computers, machinery Products for industry such as petroleum and service products.
Most people in America are Protestant.
Environment and society
Climate are rising. Snow and rainfall patterns are shifting, and more extreme climate events ex: heavy rainstorms because rising levels of greenhouse gases in atmosphere
Air pollution occurs from industrial plants and engines.
Place and region
Located in North America, the country is bordered on the west by the Pacific Ocean and to the east by the Atlantic Ocean. Along the northern border is Canada and the southern border is Mexico.
Uses
USA has maritime borders with many countries. There is a large area. Make the economy grow well which is an advantage in trading both in the past and in the present.
USA has problems with natural disasters quite often, making building structures quite strong to cope with various natural disasters.
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