英语作文how can we own a blue sky

how can we own a blue sky
As the industry get highly development ,our sky is no longer shinning,no longer blue,so much more smog floating in the air.
how can we make our sky bule?First,most fo smog is cause by the car,so we can take public transit,like bus,subway,also we can ride bike,and if you like,by foot is OK.
Second,our factory should use much more green materials instead of non environmental materials,and try the best to reduce the pollution.
if all of us take the advice I give,our future will getting bette

我们怎么才能拥有蓝天！