In the environment industry, a substance refers to any material that has a distinct chemical composition and properties. Substances can be either natural or man-made, and can be found in solid, liquid, or gaseous form.

Examples of substances in the environment industry include:

• Chemicals: Chemicals are substances that are made up of atoms or molecules and have specific properties and characteristics. They can be found in a wide range of products, including pesticides, fertilizers, cleaning agents, and industrial materials. Some chemicals can be harmful to human health or the environment if not properly used or disposed of.

• Pollutants: Pollutants are substances that are introduced into the environment and have a negative impact on human health or the natural environment. Examples of pollutants include air pollutants such as carbon monoxide and ozone, and water pollutants such as heavy metals and oil.

• Natural substances: Natural substances are substances that occur naturally in the environment. These can include elements such as carbon and oxygen, as well as compounds such as water and minerals.

• Waste products: Waste products are substances that are produced as a result of human activities and are discarded or no longer needed. Examples of waste products include household trash, industrial by-products, and agricultural waste

In the environment industry, it is important to carefully manage and regulate the use and disposal of substances in order to minimize their impact on the environment and human health.