legalization of marijuana, education, abortion, health care, the environment
Some environmental issues in North America are global warning and oil spill.
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There are four political entities in North America. The four political entities are Canada, France, United States, and, of course, Mexico.
democracy
Capitalism
America has always had political allies; even at the time of the Revolutionary War, the rebellious colonies were aided by France. America is currently part of a formal alliance called NATO (the North Atlantic Treaty Organization) and America's NATO allies are helping America in its current war in Afghanistan. I really do not know what could have given you the idea that America should not have political allies. Allies are helpful.
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kuroshio current
it is south america
There isn't really a "main political" land. All of the countries are political to some extent, in North, Central, or South America.
The Ocean Current that most affects the weather in North America is probably the EL NINO or the UPWELLING Currents.
The two political countries that divide the Caribbean are Haiti and the Dominican Republic, sharing the island of Hispaniola.