Pollution has become a serious problem in almost all the big cities of the world. City people are becoming more and more worried about how they can 1 pollution. They are also concerned about whether the government is doing enough to 2 the environment. However, people in Ireland don't have these worries. They are sure that they have found the 3 the problem. They use windmills. These windmills can create power without 4 pollution. This method is so successful that other countries are 5 doing the same. Why not? What works for Ireland can work for any other country?