The following blog has a lot of words to learn to enhance your vocabulary. All words are currently taken from "Word Power" by Reader's Digest. Please check out my other blogs at poetrylighthouse.com and timetogetupclub.com!
Rising smoke forms a ceiling over a valley due to a an inversion, an overlying layer of warmer air.
atmospheric inversion (n) - reversal of normal thermal conditions as occurs when warmer air prevents cooler, denser surface air from rising. Pollutants can become trapped in the cool air.