Before that, the scientists established a planetary boundary. That is the point where we as humans have polluted the planet to the point that it threatens the stability of the past 10,000 years.
For example, pesticides kill many insects that are fundamental to ecosystems and therefore provide clean air, water and food.
The scientists who conducted the study say stricter rules are needed. In the future, for example, there must be a limit on the production of chemical substances and on how many of them may be released into nature.