________ Is the Brown Haze Seen Over Large Cities Caused

question 86

Short Answer

________ is the brown haze seen over large cities caused by automobile exhaust.

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Definitions:

Sealed-Bid

A bidding process where all bids are submitted confidentially to the auctioneer with no bidder knowing how much others have bid.

Lemons

In the context of economics, refers to products of lower quality that are difficult to distinguish from higher quality products before purchase. In a general context, it's a citrus fruit.

Expected Value

A statistical concept that calculates the average outcome of a random event when the process is repeated many times.

Dipstick

A tool used for measuring the quantity or level of fluid in a reservoir, notably oil in an engine.