One way that the earth can help is by adding more sand or dirt to the run off edges, or by growing different plants on the muddy hills. The reason that the earth needs to be saved is because the earth might be losing part of the history or national land marks. There are many different ways to try to save the earth. The main thing that people said earlier was erosion. So does tillage.
Tillage is a way of bringing many different biological things to a place.
Some things that people found out about it was another way to add soil to grow crops. What this does is it replaces the infertile soil with fertile soil which covers up the unwanted weeds. What this is saying is that it buries the unwanted weeds so the farmers can grow corn, wheat, and other crops. That is the basic idea of tillage. Then are so many forms of erosion for instance avalanches destroy trees, and water high winds that could cause the land to disintegrate little by little.