Plants completes our Nature. They are biologically called the "Autotrophs" which means the only living thing which can produce their own food. They prepare their own food with the help of raw materials like sunlight, carbon-dioxide, water etc & prepare their food in a process called photosynthesis. But in return gift us with Oxygen (a by-product of photosynthesis) which supports all life forms on the planet Earth.
Now-a-days the increase population had put a great pressure on the trees & deforestation had taken place in a higher scale which is increasing even on a higher rate.
The adverse affect is well known to all of us. Phenomena like greenhouse effect, global warming, and other natural calamities have shown their rise.
The only solution should is that we become more aware of need of the trees rather than ours. Plant more trees so that we can minimize the effect of pollution, control global warming, greenhouse effect.
Our motto should be "If you cut one tree plant 10 trees" to protect our Our nature.
The World Environment Day should not be just a day to remember but also to be implemented & carry out its real purpose.