Answer:
Environmental factors include temperature, food, pollutants, population density, sound, light, and parasites. The diversity of environmental stresses that have been shown to cause an increase in asymmetry is probably not exclusive; many other kinds of stress might provide similar effects. Environmental factors are significant contributors to population health across the life course. Early life exposures can lead to diseases later in life. Environmental chemicals are ubiquitous in our environment and can be found in air, food, drinking water, and consumer products.
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