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In a nearby lake affected by climate change, a volunteer is holding a water sample in a test tube Royalty Free Stock Photo

Scientist in protective glove collects water sample in test tube for analysis. Close-up of hand holding vial, sampling liquid Royalty Free Stock Photo

Scientist in blue gloves collects river water sample in test tube for environmental safety and public health analysis. Close-up Royalty Free Stock Photo

Environmental engineer tests water reservoir. Person in gloves collect water sample in test tube. Clear liquid splashes Royalty Free Stock Photo

Sampling from open water. A scientist or biologist takes a water sample. Water sample in a chemical test tube with a Royalty Free Stock Photo

Water sample. A man`s hand in a blue glove holds a test tube with a water sample. Background Royalty Free Stock Photo

Water sample. Test tube with water. Sea and blue sky in the background. Water purity analysis and environment concept. Water testing. Infections and bacteria.