Answer:
By reading about the delay in Shanghai flights, we can learn that excessive air pollution can hinder the most modern and fast transportation methods.
Step-by-step explanation:
As we can see by reading the text, the excess of air pollution, caused flights in Shanghai to take off late, due to the danger that the polluted air that hinders the visibility of the pilots, in addition to disrupting the operation of the plane, which it is a modern, fast and secure means of transport. This shows how air pollution is dangerous and must be combated in the best possible way, because in addition to promoting the decline of human health, it can cause economic, social and infrastructure problems in cities.