Написать сочинение. . what do you thinkthe most serious problem in the world is? why?

Juvenile crime
а дольше сама в инете поищи
есть очень хорошие соченения

I think that the biggest problem in the world is pollution. every day thousands of factories emit waste into the street. pollute rivers and forests. animals and fish die. Ozone layer and decreases the accumulation of carbon dioxide occurs. we must follow the environment and nature conservation.