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

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

A man crouched in a protective suit to take a sample of a plant from water into a Petri dish for laboratory research

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

A scientist, in a protective suit, mask and gloves, takes a liquid from the river in test tubes, for a sample, against the background of a drainpipe

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

The man checks the duration of the protection of the special suit in the conditions of pollution, putting it on

A man in special protective clothing against chemical contamination measures the level of pollution with the help of instruments

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 takes soil samples into a Petri dish from the sewage treatment plant

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

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

Environmental biologist in a protective suit and mask examines water from the river for viruses

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 performs an express test for water pollution from a 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 in a gutter pours water into a flask to study the level of pollution, close-up

A man in a protective suit and a respirator against bacteria and viruses sits by the river next to a mobile laboratory for research