Summary Listen to the passage. For questions 26 - 30 , comple t e the notes using n o more than three words for ea ch bl a nk. At night, bright lights in city areas block the stars and cause (26) _______. Sometimes many citizens cannot sleep because of the light coming into their homes. And this can cause serious (27) ______. Animals and plants also suffer. Light affects the growth of plants, and it can (28) ______ and hurt animals. In addition, the cost of lighting city areas is huge. The waste of (29) _______ is totally unnecessary. We need to (30)______ our use of lighting to save ourselves from the pollution.