Egy laboratóriumi asszisztens gumikesztyű segítségével kék reagenst önt egy lombikból egy kémcsőbe vízzel, hogy elemezze a szintet. - Stock fotó és kép

Scientist's hand, in a protective suit and gloves, pours liquid from a flask into a pond

Scientist's hand, in a protective suit and gloves, collects liquid into flasks and test tubes, for testing, against the background of the river

Close - up of a Petri dish, with grown plants, in the laboratory, the hands of a scientist planted in the environment

Close-up of a Petri dish with a sample of plants from a pond for research in the hands of a laboratory worker, top view, on a background of water

A scientist, wearing protective gloves and a uniform, conducts research with plants, pouring reagent from a test tube into a Petri dish, close-up

Scientist's hand, in a protective suit and gloves, pour blue liquid into a flask, against the background of sewer pipes

On the suitcase is equipment for express analysis of soil and air in the mode of mobile environmental research for pollution

Mobile laboratory for the study of soil and air quality, close-up

Close-up of a scientist's hand in blue protective gloves, against the background of a river and test tubes with liquids, puts a mobile phone on a black suitcase for inventory