Our planet, the Earth and environment

I've been to the exhibition 'The Earth and environment'.
I've very impressed how old our planet Earth is and how young our human beings are to be compared with other former creatures such as dinosaurs, and ancient mammals.
It's said that the era of dinasors had lasted for I.5 billion years and ended by the collision of the meteorite.
I really think clearly that we can learn from the history.
Human beings are still new for the Earth but we developed only for our profits and destroyed nature much more than it had been taken in its history.
Our life can't exist without natural gift.
I hope all of us notice and care for our mother land.