What could people do to decrease erosion of the earth’s surface?

Stop doing so much construction. When construction workers built highways they build it on top of a small man-made mountain and then set the road on top and put the grass on the dirt leaving the sides to erode overtime. But don't forget the bottom, underneath the bridge when you drive out there are two columns that slowly decrease and are not always patched by brakes to keep from eroding, but when storms and heavy winds come, it will wash away.