There is too much noise in the city.
城市里太吵杂了。
Do you think the air pollution in the city is serious?
你觉得城市里的空气污染严重吗？
What's the main reason for water pollution in this area?
这个地区水污染的主要原因是什么？
The living environment of wild animals is getting worse and worse.
野生动物的居住环境越来越差。
The environmental pollution makes the world become warmer than before.
环境污染使地球变得比以前暖和。
People ruin the environment unconsciously everyday.
每天，人们都无意识地在破坏环境。
Don't litter.
别乱扔垃圾。
