Abgeschnittenes Bild eines männlichen Wissenschaftlers in Schutzanzug und Maske, der Bodenproben mit der Pinzette in Testkolben im Freien legt - Stockfoto & -bild

Chemist on river bank with test tube and water in hands

Chemist in respirator and blue gloves with test tube in hands takes sample of water near lake shore

Male scientist in protective mask and suit writing in clipboard near water outdoors

Two scientists in protective suits and masks examining fish and writing in clipboard outdoors

Sampling from open water. A scientist or biologist takes a water sample. Water sample in a chemical test tube with a pipette.

Closeup of a female scientist examining the liquid contents of a conical flask in the forest. Ecology and environmental pollution concept.

Laboratory assistant in respirator and blue gloves with test tube in hands takes sample of water near lake shore

Ecologist in blue gloves with test tube in hands takes sample of water near lake shore

A scientist in a protective suit and blue gloves, conducts a study on the ground, pours blue liquid from a test tube into a flask

Cropped image of male scientist in latex gloves taking sample of stone by tweezers outdoors

Pest control worker spraying pesticides on street with sprayer

Portrait of pest control worker in respirator looking at camera

Cropped image of pest control worker holding sprayer

Pest control worker in respirator spraying pesticides with sprayer on building wall

Selective focus of female scientist in protective suit and googles holding clipboard in meadow

Portrait of pest control worker in respirator looking at camera

Male pest control worker in uniform spraying chemicals on bush