<P> Tropical rainforests produce about 30% of our planet's fresh water . </P> <P> Deforestation disrupts normal weather patterns creating hotter and drier weather thus increasing drought, desertification, crop failures, melting of the polar ice caps, coastal flooding and displacement of major vegetation regimes . </P> <P> Undisturbed forests have a very low rate of soil loss (erosion), approximately 2 metric tons per square kilometer (6 short tons per square mile). Deforestation generally increases rates of soil loss, by increasing the amount of runoff and reducing the protection of the soil from tree litter . This can be an advantage in excessively leached tropical rain forest soils . Forestry operations themselves also increase erosion through the development of (forest) roads and the use of mechanized equipment . </P> <P> China's Loess Plateau was cleared of forest millennia ago . Since then it has been eroding, creating dramatic incised valleys, and providing the sediment that gives the Yellow River its yellow color and that causes the flooding of the river in the lower reaches (hence the river's nickname' China's sorrow'). </P>

Deforestation decreases with enhanced awareness about forest conservation objective