太阳能发电已经超过风力发电，成为世界上发展最快的能源。目前，世界各地的太阳能总发电能力约为800MW，足以满足20万个美国家庭一年的用电需求。风力的总发电能力约为7639MW，可供190万个美国家庭使用一年。尽管目前太阳能在全球电力供应中所占的比例不1％，但是随着各国逐渐 Solar power has surpassed wind power to become the fastest growing energy in the world. At present, the total solar energy generation capacity around the world is about 800MW, enough to meet the electricity demand of 200,000 U.S. households for one year. The total wind power generation capacity is about 7639MW, which can be used by 1.9 million U.S. households for one year. Although the current share of solar power in the global electricity supply is not 1%, but as countries gradually