What is the word for, "spoken lies that are harmful to someone's reputation"? 7 letter word

What are three uses of the yangtze river by the people living among the river

In the wake of the civil war, compared to the south the north had sustained very little destruction. had to create a new labor system. had more economic challenges. had to repair damaged property.

Give an example of a situation in which an individual's pursuit of economic self-interest may not benefit but instead harm the rest of society