11. Power without Pollution
    Pollution is a big problem in almost all the big cities of the world. City people are, therefore, becoming
    more and more worried about how they can get rid of pollution. They are also concerned about whether the
    government is doing enough to protect the environment.
    However, people in Ireland don't have these worries. They are sure that they have found the answer to the
    problem. They use windmills. These windmills can create power without creating pollution. This method is so
    successful that other countries are thinking of doing the same. Why not? What works for Ireland can work for
    any other country.
    I am ready. = I am all set.
    Don't pollute this river.
    Yesterday afternoon we had a power failure for two hours. 停電
    During the power failuer, the lights usually go out.
    a big problem = a serious problem
    You should rid youreself of that bad habit of smoking.
    concerned = worried
    People in ireland, however, don't have these worries.
    People in ireland don't, however, have these worries.
    answer to = solution to
    creat / produce / generate