Final answer:
The tone of the essay would be formal and serious.
Step-by-step explanation:
The tone of an essay written for a class project and meant to inform readers about the dangers of air pollution would probably be formal and serious. This is because the topic of air pollution is a serious issue that requires a professional and informative approach. The purpose of the essay is to educate readers about the dangers of air pollution, so a formal tone would be more suitable.
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