Исправьте, пожалуйста, ошибки в сочинении по английскому

Now the human beings are killing the Earth. Millions of animals
die every year because man has polluted their natural homes.
Forests as large as Belgium are destroyed every year.
Air is polluted by power stations and factories. We live among
litter and wastes. Pollution is very dangerous for people,
wildlife and the environment. People, don't pollute the
environment!
We pollute ourselves with cigarettes, alcohol and junk food.
Moreover, people make wars. There are many reasons for that.
Usually one country wants more land or money. Sometimes people
fight because the enemy is too strong, and sometimes because
it is not strong enough. This is a worldwide disaster too.

If the mankind solves all problems, our life on the Earth will
become better. People would forget the wars and all pollution
problems. The life on the Earth would be more quiet and peaceful.

Now human beings are killing the Earth. Millions of animals die every year because man has polluted their natural homes. Forests the size of Belgium are destroyed every year. (The) Air IS polluted by power stations and factories. We live among litter and waste. Pollution is very dangerous for people, wildlife and the environment. People don’t pollute only the environment. They pollute themselves with cigarettes, alcohol and junk food. Then, there are wars. There are many reason for these. Usually one country wants more land or money. Sometimes people fight because the enemy’s too strong, sometimes because IT isn’t strong enough. It’s an international disaster too. If people solve all (the) problems, life on the Earth will be better. People will forget (the) wars and all pollution problems. Life on the Earth WILL be more quiet and peaceful.

Now mankind beings to kill the Earth. Millions of animals die every year because man has polluted their natural homes. Forests the size(?) of Belgium are being destroyed every year. Air is polluted by power stations and factories. We live among litter and waste products. Pollution is very dangerous for people, wildlife and environment. People do not only pollute the environment. They pollute themselves with cigarettes, alcohol and junk food. People still make wars after all. (Люди вдобавок ко всему еще и воюют) There are many reason for that. (Для этого есть много причин) Usually one country wants more land or money. Sometimes people (мн ч) fight because the enemy is too strong, sometimes because it isn’t strong enough. It’s an international disaster too. (Это тоже всемирное бедствие) If people (если стоит if никакого will) solve all problems, life on the Earth will (если хочешь употребить would в первой части должно стоят solved "если решали бы") be better. People will forget the wars and all pollution problems. Life on the Earth will be more quiet and peaceful.

Как вас в заставляют писать сочинения, не научив грамматике?