Tree is the most important part of world. They provide wood for building and pulp for marking paper. It provides habitats for all sorts of insects, birds and other animals. All fruits, nuts, vegitavels come from trees. Even the sap of trees is useful as food for insects and for making maple syrup -yum.
Trees mostly important to us because trees keep our air clean and our ecosystem healthy. We breathe in oxygen and breathe in carbon dioxide.and Trees breathe out oxygen.
We are real partners in between human and trees.
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From @rajib9954