Why does a person need to learn to ensure a harmonious existence in natural conditions?

In ancient times, man was a slave to nature, he constantly waited for her mercy: good weather, warm wind, mild winter. Over time, from a slave, he turned into a master. Only problems from this did not diminish. The activities of the population of our planet negatively affect natural conditions. People need to learn to do everything in moderation. To moderately extract minerals, hunt animals, cut down forests, build factories and plants. Excessive exploitation of natural resources threatens the complete depletion of natural resources.