Exposure to chemical and physical agents in the environment can produce a wide range of adverse health consequences environmental epidemiology attempts to determine whether a hazard exists that is whether there is a causal relation between exposure to certain chemical or physical agents and adverse health effects and to measure and characterize any causal relations to assess the . Better exposure assessment in environmental epidemiology will increase the power of studies to find associations however within a fixed budget spending more money on exposure assessment per subject will reduce the number of subjects who can be studied and hence could reduce statistical power. Mark j nieuwenhuijsen phd is research professor at the centre for environmental epidemiology creal in barcelona spain he is an expert in environmental exposure assessment epidemiology and health risk impact assessment and has authored or co authored more than 250 peer reviewed papers. The recent and rapid expansion of occupational and environmental epidemiology and health risk assessment looks set to continue in line with growing public government and media concern about occupational and environmental health issues and a scientific need to better understand and explain the effects of occupational and environmental pollutants on human health. Human exposure to particulate matter air pollution is linked to increased mortality exacerbation of asthma and copd symptoms decreased respiratory rate and lung function and increased blood pressure and other cardiovascular disease risks our exposure to environmental air pollution is involuntary and lasts from fetal development through every life stage
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