close-up environmentalist hand of a researcher, produces a process of taking a sample of water from a river
Schlüsselwörter
water,
test,
ecologist,
research,
ecology,
sample,
environment,
river,
scientific,
glove,
professional,
environmental,
chemical,
scientist,
reagent,
laboratory,
canvasses,
protective,
flask,
nature,
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biology,
science,
examine,
analysis,
study,
health,
liquid,
glove,
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biological,
measuring,
measurement,
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epidemic,
pollution,
infection,
concept,
radiation,
lake,
impurity,
blighted,
waste,
bottle,
clarity,
expertise,
chemistry
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