Mâle scientifique en masque de protection et costume écriture dans le presse-papiers près de l'eau à l'extérieur - Photo & image de stock

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

Serious 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

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

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

Male scientist in protective suit and mask taking sample of water in test flask outdoors

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

Scientists in protective masks and suits examining fish and writing in clipboard outdoors

Pest control worker spraying pesticides on street with sprayer

Portrait of pest control worker in respirator looking at camera

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

Portrait of pest control worker in respirator looking at camera

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

Low angle view of pest control worker standing with sprayer

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

Pest control worker spraying pesticides on street