Assertion: warm air | /r/CapableOf | rise through cooler air
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text: These so-called eddies of rough air are caused by three main categories of interference: thermal, where warm air rises through cooler air; mechanical, where a mountain or manmade structure alters air flow; and shear, which occurs along the border between two pockets of conversely moving air—like if a pilot crosses into the jet stream to take advantage of a tailwind.