英语短文改错Forests help to stop droughts and floods,because China

英语短文改错
Forests help to stop droughts and floods,because China
has built a new Great Wall through the northern part
of the country.The Great Green Wall is 7,000 kilometre
long,between 400 and 1,700 kilometers wide.It will
stop the wind of blowing the earth away.It will stop the
sand movinng towards the poor farmland in the south.
If more Great Green Walls are built and more good
lands will be protected and then more crops will be
produced to feed more people.So it's our duty to
stop cutting down some trees.
改错,一行一个,能给翻译最好