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Human health is influenced not only by the physical environment,
but also by social and economic factors. Traditionally, it has been the practice
to include health-related risks as part of EIA studies. However, it is being
increasingly recognized that a more comprehensive and rigorous approach needs to
be adopted to identify and appraise those environmental factors which may affect
human health, in the form of an environmental health impact assessment (EHIA).
The various factors influencing human health can include geology, vegetation,
demography, economics, pollutants, as well as the availability of health
services.
The World Health Organization (WHO) has undertaken a great deal of
fundamental research on EHIA, holding regular seminars, publishing
documentation, and developing
methodologies.
