wind power fastest growing energy sources 100,000 workers were employed schwer für die Industrie, dieses Tempo zu halten energy.gov noise pollution obstacles and challenges Efficiency and Renewable Energy do not pollute the air largest source remote locations This Energy.gov in rural areas Advantages and Challenges of Wind Energy Energy.gov Advantages and Challenges of Wind Energy environmentally friendly $9 billion dollars of private capital energy.gov the Department of Energy has said Office of Energy Efficiency and Renewable Energy www.energy.gov US Department of Energy's Wind Energy one of the fastest-growing sources of energy in the world to grow This wind power 行業很難跟上這個步伐 United States Department of Energy Wind energy hard for the industry to keep up this pace This Energy Department page about wind power Advantages and Challenges of Wind Energy $.02 per kilowatt-hour Wind is a cost-effective source of power US economy economies more stable Office of Energy Advantages and Challenges of Wind Energy wind has a number of unique challenges $220 million source of renewable energy one of the fastest-growing sources of energy in the world wind power same benefits