It pollutes the air and can get people killed by cave in's.
This change is a result of "contact hypothesis".
The contact hypothesis has been portrayed as a standout among other approaches to enhance relations among people that are encountering conflict. Gordon W. Allport is frequently credited with the presentation of the contact hypothesis. The preface of Allport's hypothesis expresses that under suitable conditions interpersonal contact is the best approaches to decrease prejudice among larger part and minority group individuals.
Answer:
The North thought it would win the Civil War because it had more industry. The South thought it would win because it had an excellent cavalry and well trained soldiers.
Explanation: