Is there an alternative energy resource that could be used in most of the United States? Which one would be the cheapest? Currently, our economy is heavily reliant on fossil fuels. Is it a good idea...

Is there an alternative energy resource that could be used in most of the United States? Which one would be the cheapest? Currently, our economy is heavily reliant on fossil fuels. Is it a good idea to spend time and resources developing alternative energy resources and technologies instead of exploring for more oil and building more refi neries? Explain your answer.