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What country has the least pollution?

Answer 1

Iceland - Cleanest air in the world.

Because of its large amount of greenery and sparse population, Iceland—which is in Northern Europe and has the lowest population density in all of Europe—has the cleanest air in the world when it comes to air pollution.

see this link: 2017's Top 10 Least Polluted Countries

Further information about various nations' pollution levels can be found at the aforementioned link.

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Answer 2

Julia Acosta

Iceland.

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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.