Crowded and unmanned rush on the roads and careless driving are the causes of the road accidents.
There are many causes of unemployment.
There are many causes of the deforestation such as wood extraction because of the increasing human population and industrial interests of the people.
Smoking causes cancer, infections in lungs, bronchitis, peptic ulcers and many other deadly diseases.
Gestational diabetes is a common pregnancy complication that causes high blood sugar levels in the mother and the disorder can lead to future health problems for both mother and child.
The causes of global warming are many.
What causes pollution of air?
The heavy rain causes floods.