Female ecologist wearing protective coverall, respiratory mask, gloves and rubber boots collecting water sample into test tube while examining polluted gulf
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
Two ecologists wearing protective coveralls and respiratory masks discussing test tubes with samples of polluted water while working at gulf coast
Ecologist wearing protective coverall, rubber boots and respiratory mask crouching on polluted shore, collecting sample of soil and examining test tube
Ecologist wearing protective coverall and respiratory mask collecting sample of soil on polluted gulf shore with warning biohazard sign
Two female ecologists wearing protective coveralls and respiratory masks examining test tubes with samples of polluted water and talking while working at gulf coast
animation - of unrecognizable ecologist in protective coverall and gloves taking sample of water in polluted river or lake with test tube
Slowmo close up of unrecognizable ecologist in protective coverall and gloves taking sample of water in polluted river or lake with test tube
Low angle shot of ecologist in protective coverall, gloves and respiratory mask holding test tube and examining sample
Two ecologists wearing protective coveralls and respiratory masks collecting samples of lake water in polluted area with warning biohazard sign
Group of ecologists wearing protective coveralls and respiratory masks walking along gulf coast with sample case and having discussion while doing research in polluted area