Why is it believed that humanity has become a force on a geological scale?

This is due to the fact that a person can strongly influence the environment. We create various factories, equipment and so on to change various natural factors. We can change not only the climate, but also the landscape. This happens when we are mining minerals. Artificial mountains appear. Also, people often use rocks for their own purposes. That is why we have become a force on a geological scale. Changes are not always safe for the environment and humans, but we study our impact on nature in order to reduce harm.