<human>: I've heard that there's a big problem with pollution in the United States. What are the main causes of pollution?
<bot>: The primary causes of air, water, and soil pollution in the US are industrial emissions from cars, factories, power plants, and other sources. These emissions contain chemicals such as sulfur dioxide, nitrogen oxides, and volatile organic compounds that can be harmful to human health and the environment. Additionally, waste disposal practices and agricultural runoff have been linked to increased levels of toxins in our waterways.