Q: During what time period did poor air quality become a problem?


Read this paragraph and choose the correct option from the provided answers:

Poor air quality started to become a serious problem after the Industrial Revolution. The machines in factories burned coal. This released a lot of pollutants into the air. After 1900, motor vehicles became common. Cars and trucks burn gasoline, which adds greatly to air pollution.

 Choices:

- Chernobyl disaster

- coal industry boom

- second world war

- industrial revolution


A:
industrial revolution