Based on the research topic, the following would provide useful information:
Articles which write about anti-pollution efforts by the government would show both pollution issues and what is being done about them.
Globalization is a leading cause of pollution so you can also look at books that cover the effects of globalization. Lastly, government data on air pollution will also be useful.
Find out more on reliable and useful sources for research at https://brainly.com/question/17343177.
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