Test 22B 短文填空Other scientists are finding ways to stop light pollution and make our lives better.For example,many streetlights now have covers.The covers focus the light towardsthe ground.They stop the light from going up into the sky.They also save energy.Thecovers are a small change,but they can still have a positive(正面的)effect.其他科学家正在寻找方法阻止光污染，让我们的生活更美好。例如，许多路灯现在都有灯罩。这些灯罩将光线集中到地面上。它们可以阻止光线往天上照。它们还可以节省能源。这些灯罩是一个小的改变，但它们仍然可以产生正面的影响。
