Final answer:
False, toxicity is one of several factors in assessing the seriousness of a chemical hazard, including exposure level, duration, and mode of interaction with the body. Environmental toxicology involves studying both immediate and long-term effects, such as endocrine disruption.
Step-by-step explanation:
The statement "Toxicity is the main determinant of assessing the potential degree of seriousness of a chemical hazard" is False. Toxicity is indeed a critical factor in assessing chemical hazards, but it is not the only determinant. Factors such as exposure level, duration, and the way the chemical interacts with the body (e.g., through inhalation, ingestion, or skin contact) also play an essential role in determining potential harm. Additionally, environmental toxicology considers both the immediate lethal effects and subtle long-term effects like endocrine disruption that can happen at lower doses over time.
Toxicology, broader than just studying lethal does, involves exploring the adverse effects of various agents, including chemicals, on living organisms and ecosystems. It involves the study of dose-response relationships, where different doses can result in a range of responses, from benign to lethal. This is often represented through a dose-response curve. There's also focus on how substances may cause harm through various mechanisms, such as endocrine disruption, even at low exposure levels. These complexities are why the single measure of toxicity cannot solely determine the seriousness of a chemical hazard.