Environmental agents can affect health through various mechanisms:
Direct exposure: Direct contact with environmental agents, such as inhalation of polluted air or ingestion of contaminated water, can lead to immediate health effects. Indirect exposure: Environmental agents can also affect health indirectly by altering the ecosystem, food chain, or social environment. Cumulative effects: Prolonged or repeated exposure to environmental agents can result in cumulative health effects, increasing the risk of chronic diseases.
