是我们每个人的主要责任。
Protecting the environment is the main responsibility of each of us.
最近，我坐公共汽车去上班，而不是开车。
Recently, I have deliberately chosen to take the bus to work instead of driving.
这样可以减少空气污染，否则会越来越差。
This can reduce air pollution; otherwise the environment will get worse and worse.
我的朋友也这个观点，他非常爱好户外活动。
My friend also agrees with this view; he loves outdoor activities very much.
我们在公园里捡垃圾，大家都很我们的行为。
We pick up trash in the park, and everyone is very pleased with what we do.
公共卫生需要遵守，不能马虎。
Maintaining public hygiene requires following the rules; you can't be careless.
希望大家从半点小事做起，比如节约用水。
I hope everyone starts with small things, such as saving water.
这样我们的城市才能一直保持美丽。
This way, our city can stay beautiful for a long time.