How did the OPEC oil embargo affect the economy of the United States?

The OPEC oil embargo was an event where the 12 countries that made up OPEC stopped selling oil to the United States.

Explanation:

The oil embargo is widely blamed for causing the 1973-1975 recession. The oil embargo aggravated inflation by rising oil prices. Gas stations posted color-coded signs: green when gas was available, yellow when it was rationed, and red when it was gone. Furthermore, non-OPEC oil production had declined as a percentage of world output.

b) race riots in several cities

its main object was the establishment of "settlement houses" in poor urban areas, in which volunteer middle-class "settlement workers" would live, hoping to share knowledge and culture with, and alleviate the poverty of, their low-income neighbors.