In the past, since the time of the dinosaurs, there was a fresh and clean water source, but today because there are factories, factories and oil produced, the water is not beautiful, rivers, lakes and lakes. The beautiful lake is thrown down by people using recyclable items to make the water unavailable, so we need to be consciously aware to protect the natural resources that are given to them to me.
chúc chị học tốt ạ!!!
