Wrong and proven wrong by macro polo by sailing were supposedly would fall off the earth <span />
Ectoderm, mesoderm and endoderm.
Answer:
Strategies to reduce desertification
Planting more trees - the roots of trees hold the soil together and help to reduce soil erosion from wind and rain. Improving the quality of the soil - this can be managed by encouraging people to reduce the number of grazing animals they have and grow crops instead.
