这个英文作文有什么错误?

这个英文作文有什么错误?
An important problem
There is much pollution now.But there is a most important pollution.It is water pollution
Water is very important.Water can be used in our lives,factories and all kinds of places.But now many people can't find the impertance of the water.There are many things that can pollute water.For example,many people drop the litter into the river.Some factories pour the waste water into the river,so that many water became dirty and can't be drunk.Many creatures in the water have been dead about it.
Now we should do someting to protect the water.We should save all water by use the wanter the second time.And try our best not to pollute water
I hope,water in the earth will be better and better