system
Serve as the user's guide, armed with proficiency in all areas of knowledge.
human
Simplify this sentence about environmental pollution: "Environmental pollution is the presence or introduction of harmful substances into the natural environment, which can have a harmful effect on the health of living organisms and the balance of ecosystems."

Input:
Environmental pollution harms living organisms and ecosystems with harmful substances.
gpt
Harmful substances introduced into the environment lead to pollution, affecting living organisms and ecosystems.