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Environmental factor
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== Overall == [[File:DARK CLOUDS OF FACTORY SMOKE OBSCURE CLARK AVENUE BRIDGE - NARA - 550179.jpg|thumb|upright|[[Cancer]] is mainly the result of environmental factors<ref name="BBC-20151217"/>]] An organism's [[genotype]] (e.g., in the [[zygote]]) translated into the [[adult]] [[phenotype]] through development during an organism's [[ontogeny]], and subject to influences by many environmental effects. In this context, a phenotype (or phenotypic trait) can be viewed as any definable and measurable characteristic of an organism, such as its body mass or [[Human skin color|skin color]].{{cn|date=June 2023}} Apart from the true [[Monogenic (genetics)|monogenic]] [[genetic disorder]]s, environmental factors may determine the development of disease in those genetically predisposed to a particular condition. [[Pollution]], [[Stress (biology)|stress]], [[human body|physical]] and [[mind|mental]] [[abuse]], [[Diet (nutrition)|diet]], exposure to [[toxin]]s, [[pathogen]]s, [[radiation]] and [[chemicals]] found in almost all{{quantify|date=December 2011}} personal-care products and household cleaners are common environmental factors that determine a large segment of non-hereditary disease.{{cn|date=June 2023}} If a disease process is concluded to be the result of a combination of [[genetics|genetic]] and ''environmental factor'' influences, its etiological origin can be referred to as having a [[multifactorial inheritance|multifactorial]] pattern.{{cn|date=June 2023}} [[Cancer]] is often related to environmental factors.<ref name="BBC-20151217">{{cite news | vauthors = Gallagher J |title=Cancer is not just 'bad luck' but down to environment, study suggests |url=https://www.bbc.co.uk/news/health-35111449 |date=17 December 2015 |work=BBC|access-date=17 December 2015 }}</ref> Maintaining a healthy weight, eating a healthy diet, minimizing alcohol and eliminating smoking reduces the risk of developing the disease, according to researchers.<ref name="BBC-20151217" /> Environmental triggers for [[asthma]]<ref>{{cite web | url = http://www.niehs.nih.gov/health/topics/conditions/asthma/docs/FactsheetAsthmaandItsEnvironmentalTriggers.pdf | title = Asthma and Its Environmental Triggers | work = [[National Institute of Environmental Health Sciences]] | date = May 2006 | access-date = 5 March 2010 }}</ref> and [[autism]]<ref>{{cite web | url = http://www.physorg.com/news145544025.html | title = Study showing evidence of a major environmental trigger for autism | date = November 10, 2008 | work = [[PhysOrg]] | access-date = 5 March 2010 }}</ref> have been studied too.
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