Un homme en combinaison de protection et masque tient dans ses mains une pipette d'eau de la rivière à verser dans un tube à essai pour étudier la qualité de l'eau - Photo & image de stock

A scientist in a protective suit and mask collects a sample of water in a flask with a blue liquid

A man in special protective clothing holds a flask with a chemical substance in front of him

Scientist in a protective suit, collects a sample of water in a flask with a blue liquid, close-up, there is a place for the inscription

A scientist in a protective suit and mask, takes a sample of liquid from the reservoir into test tubes

A man in a protective suit and mask performs an express test for water pollution from a river

Worker in protective suit checks river water for pollution and radiation

A man in a protective suit does an express test-tube test on the river bank

Employee in a protective suit and mask conducts a rapid test of water from a river using a mobile laboratory

A man in a protective suit holds a Petri dish with a sample for plants and looks at the reaction in it after adding the reagent

A man in a protective suit and mask conducts an express test of contaminated water to identify the level of danger to the environmental environment and living organisms

A man in a protective suit and mask holds a test tube and a pipette with test water on the river after an accident

A man in a protective suit and mask holds a flask of green liquid in his hands and shows his thumb up on the background of sewage pipes coming out from the factory

A man in a protective suit holds a test tube in his hands with a green reagent for conducting water analysis against the background of the river

Side view of a man in a protective suit and mask holding a test tube and a pipette with test water on the river after an outdoor accident

Environmental laboratory specialist in protective suit and mask took a sample of water in a test tube for research, close-up

An environmental laboratory specialist in a protective suit and a mask in a gutter pours a reagent from a flask into water to study the level of pollution

Laboratory assistant in a protective suit and mask performs an express analysis at the site of contamination of the reservoir