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 wearing protective coveralls and respiratory masks discussing test tubes with samples of polluted water while working at gulf coast
Ecologist wearing protective coverall and respiratory mask collecting sample of soil on polluted gulf shore with warning biohazard sign
Low angle portrait shot of male ecologist in protective coverall and respiratory mask standing outdoors and posing for camera
Two ecologists wearing protective coveralls and respiratory masks collecting samples of lake water in polluted area with warning biohazard sign
Team of professional ecologists in protective coveralls, gloves, helmets and respiratory masks standing in polluted area, using laptop and talking
Professional charming asian biologist woman with digital tablet in protective suit, mask and gloves working on water analysis, examining test tubes with samples of polluted water on mountain river.
Low angle view of African American ecologist in protective coverall and respiratory mask applying chemicals with backpack sprayer to fence by gas pipeline