7771
Freshwater organisms inhabiting water bodies adjacent to agricultural areas , such as ditches , ponds and marshes , are good models to test such effects as various pesticides may reach these habitats through several ways , including aerial drift , run - off , and drainage .
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Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
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