Two ecologists wearing protective coveralls and respiratory masks collecting samples of lake water in polluted area with warning biohazard sign
Ecologist wearing protective coverall and respiratory mask collecting sample of soil on polluted gulf shore with warning biohazard sign
Warning sign biohazard caution at industrial waste water area
Covid-19 Biohazard warning with Virus sign
Cropped low section shot of team of ecologists wearing protective coveralls and rubber boots walking together along coastline with biohazard sign in polluted area
warning restricted area sign
Warning biohazard caution signs near industrial waste water pipes
Panning overview of yellow warning sign in one of most hazardous and polluted industrial cities with working plants and factories in background
Closeup of chemical warning sign ecologist sampling water from the river in background
Slowmo shot of group of ecologists in chemical repellent suits examining river bank of polluted biohazard area taking water and soil samples and having discussion
Close up of warning sign biohazard caution near industrial waste water pipes