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Analysis of water from the river for pollution. Hand in a blue glove holds a test tube. The concept of environmental pollution, ecology
Sample of water from a lake, river. Water sampling by a laboratory assistant for quality indicators.
Young woman checking a rain gauge in a garden to keep track of precipitation and irrigation output.
Sample water from the river for analysis. Hand in glove holding a test tube.ecology concept
Close up of a scientist's river drawing water into a research flask from a stream
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