Question: provide evidence that long-term PM exposure leads to the development of chronic bronchitis in the U.S.
PM can also cause headaches and dizziness in some people.

Answer: it is not possible to tell

Question: Some of them got really sick or went mad down there.
Some got very sick or went crazy down there.

Answer: yes

Question: All along the northern coast here you will see remains of the old railway line, which once linked the plantations to the port but now mostly provides a place for children to play or animals to graze.
There was never a railway here in this northern area.

Answer:
no