Female ecologist wearing protective coverall, respiratory mask, gloves and rubber boots collecting water sample into test tube while examining polluted gulf
Ecologist wearing protective coverall, rubber boots and respiratory mask crouching on polluted shore, collecting sample of soil and examining test tube
Professional ecologist in protective coverall, respiratory mask and gloves collecting water sample into test tube from polluted gulf
Two female ecologists wearing protective coveralls and respiratory masks examining test tubes with samples of polluted water and talking while working at gulf coast
Two ecologists in protective coverall suits and respiratory masks collecting samples of lake water in polluted area into test tube
Two ecologists in protective coveralls, gloves and respiratory masks collecting seaweeds from water polluted area into test tube
animation - of unrecognizable ecologist in protective coverall and gloves taking sample of water in polluted river or lake with test tube
Two ecologists wearing protective coveralls and respiratory masks discussing test tubes with samples of polluted water while working at gulf coast
Medium closeup with slowmo of male Caucasian scientist in protective coveralls and respiratory mask examining samples in test tube rack, working in dark secret laboratory
Slowmo close up of unrecognizable ecologist in protective coverall and gloves taking sample of water in polluted river or lake with test tube
Slowmo shot of female ecologist in chemical suit, respiratory mask, googles and gloves examining condition of water in biohazard area, taking sample of it into test tube
Woman researcher looking at drugs in test tube wearing protective gloves close up. Laboratory specialist examining vaccine samples.