Trees can be damaged or killed by a wide variety of construction activities. Some practices lead to obvious injuries such as broken branches or torn bark. Open wounds of this type deplete a plant's energy resources and provide entry points for insects, or for diseases such as oak wilt.
The worst damage, however, often remains hidden underground. Roots are one of the most vital parts of a tree. They are responsible for nutrient and water uptake, store energy, and anchor the plant. Because they are so important, it is critical that you protect roots that lie in the path of construction.
Trees are never the same shape below ground as they are above, so it is difficult to predict the length or location of their roots. Typically, however, approximately 90-95 percent of a tree's root system is in the top three feet of soil, and more than half is in the top one foot. The part of this root system in which construction damage should be avoided is called the Protected Root Zone .
We all kown that the tree is a kind of important natural resource.Because trees can help us improve environment.For example,trees can release oxygen and absorb carbon dioxide,This is a very important advantage.And trees even can protect the water resource. When it is raining,trees' roots can absorb the water and keep it not be eroded.
Of course,trees can beautify our world.Trees have a lot of benefits,so we should plant more trees to improve our envionment and protect the world where we live in.
Ladies and gentlemen, I want to say something about trees. As we know now trees are very important to human beings. First of all, they benefit our health. They send out oxygen for us to breathe. We can't live without trees.Secondly, trees can beautify our environment.
As trees are so important, we must do our best to protect them. We must enforce the tree protection laws. We must plant as many trees as possible.Only in this way can we live happily in the beautiful world.