Un homme dans une combinaison de protection trous dans les mains un stand avec des éprouvettes dans lesquelles les réactifs et les matériaux d'essai sur le fond de la rivière, vue de dessus - Photo & image de stock

Scientist in a protective suit and mask, collects materials from the pond in a Petri dish

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, top view

Scientist in a protective suit and mask, collects biomaterials from the water, for analysis, in a Petri dish

Scientist in a protective suit and mask, releases into the pond bio plants for reproduction from a Petri dish

The scientist, in a protective suit and mask, took a plant with tweezers, for a sample and puts it in a Petri dish, close-up

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, side view against the background of the river

An environmental laboratory specialist in a protective suit takes a sample of soil from the river bottom with tweezers for research, close-up

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 takes soil samples into a Petri dish from treatment facilities, close-up

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

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

Close-up of a petri dish with a sample of soil for research in the hands of a laboratory worker, against the backdrop of the environment

A man in a protective suit and mask took a soil sample from the bottom of the river into a Petri dish

A man in special protective clothing and a mask draws water from a river into a flask after discharges into the river, checking the river for environmental friendliness

An environmental laboratory specialist in a protective suit and mask stands in the water and measures the level of pollution with the device

Hand of a laboratory assistant in a rubber glove holds a test tube with water taken for analysis

A man in a protective suit holds a petri dish with a sample for research and took off his glasses to look forward