Possible version:

Dear editor,

Some years ago, my hometown used to be a beautiful place. Thick trees and green grass could be seen all over the hills. As time went on, people destroyed almost the whole forest to grow more crops. To make matters worse, people let their cattle eat up the grass. So, you can only see wasteland instead of green forests now. As a result, when it rains, the soil is washed down the hills and into the rivers. Strong winds also blow away the valuable soil that lies on the top of the fields. I do hope all the people will take good care of the forests and plant more trees to improve our living conditions.