Domestic fossil fuel production, including the many new breakthroughs under way to extract fossil fuels from shale deposits in the United States, significantly lowers the cost of fuel and reduces dependency on foreign suppliers to provide that oil. It is a simple supply and demand analysis, and the more oil produced here the less we need to import oil.
America imports a lot of fossil fuels from foreign countries. Relying on fossil fuels makes us dependent on foreign countries. In order to be independent, we should lesson our dependence on fossil fuels. Our trade relations with oil exporting countries have caused political problems in the past that are bad for national security.