Under the beautiful night landscape， light pollution has always been overlooked①.
Light pollution has become another environmental killer having direct impact on human health in the 21st century. Night light makes city more beautiful， but it also brings about some negative effects. For example， people will be affected on psychology and emotion more or less if they stay long in the environment of colorful lights. Mounted light makes people be under great press； man-made daytime makes it difficult to sleep， disrupting normal biological clock②. Eyes that contact with light source directly should be the first victim③ in light pollution that leads to visual decrease and visual fatigue④. Inappropriate lights installation is more dangerous to traffic， with which traffic rates will increase. Man-made daytime also harm birds and insects. Mounted light may damage the normal reproductive process at night. Many plants that pollinate⑤ relying on insects will be affected in varying degrees too.
Nightscape itself owns pros and cons； but we can minimum the drawbacks⑥ to the least degree. For instance， urban planning should be based on the harmonization of ecological environment by controlling and managing the billboards and neon signs scientifically； plant more trees and grass and grow more flowers and increase water areas around buildings and places of entertainment to improve the light environment； pay attention to reducing the power-source and so on. In short， we should try to make urban style harmoniously⑦ and naturally， so that people can live in a beautiful environment which is quiet， comfortable， safe， and non-polluting and non-pollution.
① overlookv. 看漏，忽略［+v-ing］
② biological clock生物钟
③ victimn. 受害者，受骗者，受灾者［(+of)］
④ fatiguen. 疲劳，劳累［U］
⑤ pollinatev. ［植］给……授花粉
⑥ drawbackn. 缺点，短处，不利条件
⑦ harmoniouslyadv. 和谐地，调和地
光污染
在美丽夜景之下，光污染被人们忽视。
光污染已经成为21世纪直接影响人类身体健康的又一环境杀手。夜景灯光在使城市变美的同时，也给都市人的生活带来不利影响。在缤纷多彩的灯光环境呆久了，人们或多或少会在心理和情绪上受到影响。刺目的灯光让人紧张；人工白昼使人难以入睡，扰乱人体正常的生物钟。在光污染中，人体最先受害的是直接接触光源的眼睛，光污染会导致视疲劳和视力下降。不适当的灯光设置对交通的危害更大，事故发生率会随之增加。人工白昼还会伤害鸟类和昆虫，强光可能破坏昆虫在夜间的正常繁殖过程。许多依靠昆虫授粉的植物也将受到不同程度的影响。
夜景照明本身有利有弊，但我们可以将弊处降到最小程度。如我偿在城市规划要立足生态环境的协调统一，对广告牌和霓虹灯应加以控制和科学管理；在建筑物和娱乐场所周围，要多植树、栽花、种草和增加水面，以便改善光环境；注意减少大功率强光源等等。总之，力求使城市风貌和谐自然，让人们能够生活在一个宁静、舒适、安全、无污染、无公害的优美环境中。
