THE NORTH AMERICAN energy infrastructure relies on a variety of resources including fossil fuels , nuclear and renewable energy . Fossil fuels contribute the largest percentage to energy production in the United States . According to data released by the U . S . Department of Energy in 2014 , fossil fuels account for 69.03 percent of the nation ’ s energy while

8.33 percent comes from nuclear power . All renewable energy sources combined generated 9.68 percent . Each of these resources requires complex processes and machinery to convert them into accessible energy . Continuing technological advancements play a large role in the efficiency , safety and viability of available energy resources .

14 May 2015