In summary, protecting our environment is everybody's responsibility.
Otherwise, there may be no trees in earth. And people can not survive without the oxygen generated by trees.
The earth is an invaluable asset that we have. We can not live without the protection of our mather nature. If we abuse the natural resources, we will get the punishment from the nature.
To make it simple, we should protect basic elements of the earth such as the woods, the air and the water. Bearing in mind that it may take 30 years to grow a tree, we should not waste it.