What do you think of the picture? The picture tells us whatc1.PM2.5. From the picture, we can see that much traffic is the mostl2.reason. Many cities in China suffered from p3.air in 2015. People have to wear masks when going outside. China is trying to d4.with these problems. As students, we can have a greener lifestyle, such as takingp5.transportation, using cleaner energy, etc. I am sure we’ll have a bluer sky sooner.

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