What impact does a person have on a natural area?

Human influence on the natural area is quite large. Human actions can lead to the death of various species of animals and plants. Also, people can cause fires in the forest. So, for example, going to a picnic a company of people may forget to put out the fire. This will cause the forest to catch fire.
Also, man-made disasters (for example, an explosion at a nuclear power plant in Chernobyl) occur through human fault. It also negatively affects the natural zone (the radiation background changes and it is simply impossible to live in this area).