Ernsthafter männlicher Wissenschaftler in Schutzanzug und Maske legt Bodenprobe mit Pinzette in Testkolben im Freien - Stockfoto & -bild

Two scientists in protective masks and suits examining fish and writing in clipboard near river

Cropped image of male scientist in protective suit and mask putting sample of soil by tweezers in test flask outdoors

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

Selective focus of smiling male scientist in protective mask and suit looking at camera outdoors

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

Serious male scientist in protective mask and suit writing in clipboard near water outdoors

Male scientist in protective suit and mask holding fish by tweezers near river

Female scientist in protective mask and suit writing in clipboard while her colleague putting sample of water

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

Pest control worker spraying pesticides on street with sprayer

Portrait of pest control worker in respirator looking at camera

Pest control worker standing in respirator in bathroom and looking at camera

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

Low angle view of pest control worker standing with sprayer

Pest control worker spraying pesticides on bush

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