I believe that we, humans, care more about our self than our significance. The concerns of most persons who lived, or live, have been survival, food, clothes, big houses, fancy cars, fat accounts we cannot consume for all our days, etc, and we think less on the value of our lives to life and the earth.
This is the reason why our population keeps increasing, but instead of a proportional increase in the quality of life and the earth, what we see is more depletion and destruction.
It shows that the majority of those who live do not contribute; they rather seek for what would satisfy them, or wait to be satisfied, or destroy things for anger of not being satisfied.
Is your life significant to life and the earth? Or are you living for yourself and what you can get out of the world?