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What are the factors that determine the level of harm an introduced chemical has on the environment? (Site 1)

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The level of harm an introduced chemical causes depends on both the chemical’s properties and the environmental context. Key chemical factors include its inherent toxicity, concentration (dose), persistence or breakdown rate, solubility and mobility in air, water, or soil, and its tendency to bioaccumulate or biomagnify in food webs. Environmental factors such as exposure duration, the sensitivity and diversity of local species, and conditions that affect chemical transformation (pH, temperature, microbial activity) also influence impact. Finally, interactions with other pollutants and the route of exposure (ingestion, inhalation, skin contact) can increase or decrease overall harm.