Two ecologists in protective coverall suits and respiratory masks collecting samples of lake water in polluted area into test tube
Ecologist taking ground samples in infected zone
Two ecologists wearing protective coveralls and respiratory masks collecting samples of lake water in polluted area with warning biohazard sign
Researchers collecting plant samples and making experiments in infected area
A general shot of a scientist in protective overalls, goggles and masks taking a water sample from a polluted sea
Ecologist wearing protective coverall and respiratory mask collecting sample of soil on polluted gulf shore with warning biohazard sign
Professional ecologist in protective coverall, respiratory mask and gloves collecting water sample into test tube from polluted gulf
Diverse scientists in protective suits and masks with tablet pc checking biohazard in forest, sampling air pollution and collecting data for laboratory analysis while walking through woodland.
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 sampling water from the river with test tube, Scientist or Biologist in a protective suit and protect mask collects sample of waste water from industrial for analyze, problem environment
Ecologist sampling water from the river with test tube, Scientist or Biologist in a protective suit and protect mask collects sample of waste water from industrial for analyze, problem environment