Photo biologi vie vettä tutkittavaksi lampi - Kuvapankin valokuva ja kuva

Chemist looks at flask with water sitting on river bank

Ecologist looks at flask with water sitting on river bank

Chemist with bulb and raised finger sits on river bank

Ecologist with test-tube and mask, protective suit, finger down, sits on river bank

Photo ecologist from back and in protective suit with flask with water in hands on river bank

Ecologist with bulb and raised finger down on nature

Photo of ecologist in mask, protective suit with test tube, thumb up, on river bank

Photography of environmentalist for examination takes water in reservoir

Laboratory assistant with test tube, thumb up, blurred background

Laboratory assistant in respirator holds flask in hands on defocused background

Laboratory assistant with bulb in hand on river bank in summer

Ecologist with bulb and raised finger up in nature

Chemist in respirator with test-tube, thumb up, on blurred background

Ecologist in safety glasses and respirator holds flask with water in hands on street

Lab assistant with test tube takes water samples on river bank

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