The energy portfolio is changing for both the United States and Australia. Both countries are rich in fossil fuel reserves and both depend on burning them as a large source of energy. Both export coal and natural gas. Both are moving to more renewable supply of energy, although with different drivers and different degrees of government leadership. The United States has a sizeable nuclear component to its energy generation portfolio, but Australia does not due to a legal prohibition. How each country meets its goals of reduced carbon emissions (official or unofficial goals) is not clear at this time.