pollution fog

First discovered ammonia gas in the troposphere
The new discovery of ammonia on the lowest level of the atmosphere will be very supportive in building a global climate change model.
Beijing's smog mist returned because people used perfume and hair spray gel?
When explaining the cause of the misty pollution coming back after 2 months disappeared, an official in Beijing said that this was done by people using perfume, hair spray gel ...
Pollution in China has caused dust and smoke equipment to grow
The pollution of smog covered the capital of Beijing and many other cities that made the anti-dust equipment quickly appear on the market.