text: Roy: Today the concentration of fine dust is high. 
  Diego: Yea I can see that through the window. 
  Diego: I cannot see anything clear.
  Roy: In the weather like this I am afraid of breathing.
  Roy: How can we protect ourselves from fine dust? 
  Roy: I heard that the masks cannot actually prevent you from find dust.
  Diego: It’s all thanks to China
  Diego: Did you hear that they moved all the production factories to the cities near to Korea?
  Roy: But why the government keep saying it’s because of the emissions from the old trucks?
  Diego: Who knows? 
  Diego: It doesn’t make any sense. China tries to protect their own people but maybe ours doesn’t 
  Diego: I guess they secretly might have made deal without the people knowing about them.
  Roy: I am just so worried about fine dust if you cannot block it even with those masks.
  Diego: After 20 years we might need this gas mask.
  Roy: horrible!
target: Roy and Diego are worried about the high concentration of fine dust. It is hard to see anything clear and even the masks cannot stop the dust. Diego suspects that it is related to China's decision to move all production factories near to Korea. 