Especialista de laboratorio ambiental en traje protector y máscara en una alcantarilla vierte agua en un frasco para estudiar el nivel de contaminación, primer plano - Foto e imagen de stock

Terrorist in a protective suit and gloves, pours liquid from a glass tube with poison, for infection, in reservoirs

The hand of a terrorist in protective gloves, pours the liquid with the poison to infect the drain pipe

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

A man in a protective suit stands in a river and pours water from a test tube into it with a reagent to analyze the level of pollution

Hand in glove collects water in a test tube.

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

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

Scientist, in a protective suit and mask, collects water from the river for testing, in test tubes

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

Close-up of a Petri dish with a sample of plants from a river into which a reagent for express research is poured from a test tube in the hands of a researcher

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 specialist in a protective suit and respirator analyzes the water in the river near the existing plant, using a flask and a pipette

The scientist, in a protective suit and mask, collects water from the river, into test tubes and flasks, there is a place for inscription

A man in a protective suit and gloves draws water from a stream using a pipette and a flask, close-up

Environmental protection company employee makes measurements of river water purity

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

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