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What two pollutants react with water to produce acid rain?
Written Assessment
A form of evaluation that involves responses or answers being provided in written form to measure understanding, skills, or competencies.
Randomized Clinical Trial
A scientific study in which participants are randomly assigned to one of the treatment or control groups to assess the efficacy of a medical intervention.
Before-after Study
A study design in which the same group of subjects is measured before and after a specific intervention or event, to assess its effects.
Case-control Study
A type of observational study where two groups are compared: those with the disease or outcome of interest (cases) and those without the disease (controls), to identify factors that may contribute to the disease's presence.
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