KARISHMA315 wrote:
Exposure to certain chemicals commonly used in elementary schools as cleaners or
pesticides causes allergic reactions in some children. Elementary school nurses in
Renston report that the proportion of schoolchildren sent to them for treatment of
allergic reactions to those chemicals has increased significantly over the past ten
years. Therefore, either Renston’s schoolchildren have been exposed to greater
quantities of the chemicals, or they are more sensitive to them than schoolchildren
were
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