How is toxicity defined in environmental health?

Toxicity in environmental health is defined as the degree to which a substance can cause harm or fatality when it is ingested, absorbed, or otherwise introduced into an organism. This definition encompasses various harmful effects that can result from exposure to chemicals or pollutants, underscoring the potential health risks associated with certain substances. Understanding toxicity is crucial in assessing the safety of materials and in making informed decisions regarding public health and environmental practices.

It is important to recognize that while some substances may be considered safe at low concentrations, they can become toxic at higher levels. Similarly, not all waste is beneficial for health; in fact, many waste products can be harmful. Biodegradable materials are those that can break down naturally in the environment and may not inherently be toxic, but this categorization does not specifically address the concept of toxicity. Thus, the correct definition focuses on the inherent dangers of substances when they interact with living organisms.