Quantitative information or data is based on quantities obtained using a quantifiable measurement process. In contrast, qualitative information records qualities that are descriptive, subjective or difficult to measure.
Pesticides are used around the world but can persist in the environment, contaminating drinking and irrigation water with toxic organic compounds. One example is Vietnam where herbicides and dioxins applied during the Vietnam war entered the water cycle, possibly leading to cancers and abnormalities in newborn babies.
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