Scienziato maschio in tuta protettiva e maschera che preleva campioni d'acqua in fiaschetta all'aperto - Foto e immagini stock

Scientist in a protective suit and mask, collects biomaterials from the water, for analysis, in a Petri dish

A man in a protective suit and mask looks away holding a flask with express test

A man in a protective suit holds a Petri dish with a sample for plants and looks at the reaction in it after adding the reagent

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

A man in a protective suit holds a Petri dish with a sample for plants and looks at the reaction in it after adding the reagent, side view against the background of the river

A man in protective clothing, looking at a tube of blue liquid, against the drainpipes

Pest control worker spraying pesticides on street with sprayer

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

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

Portrait of pest control worker in respirator looking at camera

Portrait of pest control worker in respirator looking at camera

Low angle view of pest control worker standing with sprayer

Pest control worker in respirator holding sprayer