General terms:
* Pollutant: This is the most general term for any substance that contaminates the environment.
* Contaminant: Similar to pollutant, this term emphasizes the presence of a harmful substance in a medium like air, water, or soil.
Specific terms:
* Air pollutants: These are substances released into the atmosphere that can harm human health or the environment. Examples include carbon monoxide, sulfur dioxide, and ozone.
* Water pollutants: These are substances that contaminate water bodies, making them unsafe for drinking, recreation, or aquatic life. Examples include sewage, industrial waste, and agricultural runoff.
* Soil contaminants: These are substances that pollute the soil, affecting plant growth, human health, and groundwater quality. Examples include pesticides, heavy metals, and industrial chemicals.
Other terms:
* Toxic substance: A substance that can cause harm to living organisms.
* Hazardous waste: Waste material that can pose a risk to human health or the environment.
* Environmental toxin: A substance that can cause harm to the environment and its inhabitants.
The specific term you use will depend on the context and the type of pollution you are discussing.