Científico masculino en traje protector y máscara sosteniendo peces por pinzas cerca del río - Foto e imagen de stock

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

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

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

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

A man in a protective suit and mask holds a pipette of water from the river in his hands to pour into a test tube to study the quality of water

Scientist in chemical protective suit with conical flask taking sample from river for analysis

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

A scientist in a protective suit and mask collects a sample of water in a flask with a blue liquid

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

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

Female scientist in protective suit and googles holding clipboard in meadow

Cropped image of male scientist in protective suit walking with working suitcase in meadow

Pest control worker spraying pesticides on bush

Pest control worker spraying pesticides on street with sprayer

Cropped image of pest control worker spraying pesticides with sprayer on building wall

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