每日背诵第三期47
Our ancestors enjoyed a cleaner world. The water and air were cleaner, and when people went out at night, they could look at the stars above and ask questions about our place in the universe. Nowadays, in modern cities, we can barely see the stars at night because our view of them is not only obscured by the quality of the air, but by the quality of light as well. Not many people realize that the misuse or misdirection of light is a form of pollution. Quite simply, it is called light pollution.
我们的祖先享有比较干净的世界。那时的空气和水都比较干净，人们晚上外出时，可以看着天上的繁星，探讨我们在宇宙空间的位置的有关课题。如今，在现代化的都市中，我们晚上几乎难得一见天上的星星，由于空气和光线的质量，使星空的景像变得模糊不清。很多人不知道光线的滥用和乱射也是一种污染。简单地说，这就叫做“光污染”。
(短文节选,本期开始连载： 都是光“害”的！)
