This question brought back an old memories and reminded me of the first tree I had ever planted. For sure it was for seeking fun, but it had been my first unwitting commitment towards the environment.

Benefits of Trees:

Trees provide protection from the wind, store water during times of drought and suck up extra water when it rains a lot. Trees provide places for animals and other plants to live, help keep Earth the right temperature for life and help create the air we breathe by turning the gas carbon dioxide into oxygen.

Aside from all that, many people rely on trees to earn their livings. Wood from trees for heating and building houses. Eating fruits and nuts that grow on trees. Trees are even used to make medicines.  

 If every single person in this world planted at least one tree, most of the environmental problems will dying away.