Therefore, If this does not occur, to prevent pollution and conserve the water source should start ourselves as human beings and people rely on water resources on Earth.
So if it is protected and preserved to prevent water pollution in the dry down. Should start with ourselves as a man who lives and the world rely on surface water.
Therefore, if will protect and prevent pollution and conserve water source. Should start with ourselves as a human being living and rely on the source of water on earth.