Solution:
Manmade disasters are disasters occurring due to the activities of human beings.
Examples for manmade disasters are riots and forest fires.
Riots are a situation in which a large group of people behave in a violent and uncontrolled way. Police or army will have to step in to control the unruly crowd.
A forest fire is an uncontrolled fire that burns in forests. They are not limited to a particular continent or environment.
Forest fires can smoulder for a long time—even an entire season—until conditions are right for them to grow.
Forest fires involve dead or dry vegetation getting burnt. Parched grass or fallen leaves often fuel forest fires.
Massive forest fires may start in hot and dry weather as a result of lightning or human carelessness.
Forest fire extinguishes by itself or due to heavy rainfall.