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Extreme_Qwerty OP t1_j1xvr0a wrote

During winter, when air is warmer in the atmosphere than at the surface, temperature inversions occur.

An inversion happens when the warmer air acts like a lid above the cooler air underneath, preventing pollutants from rising and dispersing, trapping them at breathing level.

Inversions are strongest in the winter months when pollution from vehicle exhaust, industrial sites and wood burning can fester near the ground, leading to poor air quality.

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