Although we can not control the dust caused by the volcanic eruption, we can travel green and reduce electricity consumption, which can reduce the particulate matter brought by coal combustion and fuel oil. In addition, we can plant more trees and flowers, which can not only absorb PM2 .5 and other particles can also beautify the environment. PM2.5 is not so scary. I believe that as long as everyone works hard to make a contribution to the environment, take off masks and breathe fresh air is no fantasy! This paragraph or word is intended to indicate:. ['As long as everyone works hard to contribute to the environment, PM2.5 is not so scary.', 'Preventing PM2.5 pollution requires the most fundamental prevention measures.', 'The source of reducing PM2.5 from the source is the most fundamental means of prevention.', 'Preventing PM2.5 pollution must address both symptoms and causes.']