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What source causes the most air pollution?

Answer 1

The answer varies, yet a paper by the University of Hawaii believes that the single largest source of air pollution may be the burning of fossil fuels.

These fuels also contribute indirectly to other issues like smog, acid rain, and—most obviously—the rise in greenhouse gas emissions.

The problem is that fossil fuels are a necessary part of our daily lives—from industrial to automotive fuel—so it's challenging to find a sustainable alternative that also lessens the environmental impact of fossil fuels.

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Answer 2

Nicholas Ahn

Generally speaking, the largest source of air pollution is the combustion of fossil fuels from vehicles, industrial processes, and power generation. However, this can vary depending on the location and industrial activities.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.