Number one is "sand dunes".
Number two is "the breakdown of rock through mechanical disintegration and physical stress."
Natural environment is of crucial importance for social and economic life. We use the living world as<span>a resource for food supplyan energy sourcea source for recreationa major source of medicinesnatural resources for industrial products</span><span>In this respect the diversity of nature not only offers man a vast power of choice for his current needs and desires. It also enhances the role of nature as a source of solutions for the future needs and challenges of mankind.</span>
A lake community with four trophic levels suddenly suffers from algal blooms. Using the strategy of biomanipulation, an ecologist may propose removing zoonplankton.
Hope I helped.
It creates a shadow.Hope I helped.
