Which of the following is NOT considered a main source of pollutants?

Clean energy production is considered a method of generating energy with a significantly lower environmental impact compared to traditional fossil fuel sources. Unlike agricultural runoff, industrial processes, and municipal systems that often release harmful substances, clean energy production focuses on renewable sources such as solar, wind, and hydro, which are designed to minimize pollution. This type of energy generation is aimed at reducing the carbon footprint and harmful emissions associated with conventional energy sources, making it a key component in addressing pollution and combating climate change.

In contrast, agricultural runoff typically contains fertilizers and pesticides that can contaminate waterways, industrial activities can release various pollutants into the air and water, and municipal waste management processes can contribute to environmental degradation if not managed properly. Thus, clean energy production stands apart as it actively seeks to reduce pollution rather than contribute to it.