Environmental health research aims to identify and assess environmental hazards, develop and evaluate interventions to reduce environmental health risks, and understand the relationship between environmental factors and human health.

Environmental hazards are factors in the environment that can adversely affect human health. Examples include air pollution, water contamination, noise pollution, and radiation.

Epidemiology is the study of the distribution and determinants of health-related states or events (including disease), and the application of this study to the control of diseases and other health problems.

Risk assessment in environmental health involves identifying and characterizing environmental hazards, estimating the probability and magnitude of adverse health effects from exposure to environmental hazards, and developing and evaluating interventions to reduce environmental health risks.

Interventions to reduce environmental health risks include air pollution control measures, water treatment, noise reduction strategies, and land use planning.

Toxicology is the study of the effects of toxic substances on living organisms, including humans.

Toxicology research aims to identify and characterize toxic substances, understand the mechanisms of toxicity, and develop and evaluate methods for detecting and measuring toxic substances.

Toxic substances are substances that can cause adverse health effects when humans or other living organisms are exposed to them. Examples include lead, mercury, arsenic, and benzene.

Environmental health science is the study of the effects of environmental factors on human health.

Environmental health science research aims to identify and assess environmental hazards, develop and evaluate interventions to reduce environmental health risks, and understand the relationship between environmental factors and human health.

Environmental health science research methods include observational studies, experimental studies, risk assessment, and modeling.

A cohort study is a type of observational study that compares the health outcomes of two or more groups of people who have different levels of exposure to an environmental hazard.

A case-control study is a type of observational study that compares the health outcomes of people who have a disease with the health outcomes of people who do not have the disease.

An ecological study is a type of observational study that compares the health outcomes of people who live in different areas with different levels of environmental pollution.

Risk assessment is a type of study that uses mathematical models to estimate the health risks associated with exposure to an environmental hazard.