Scientists biologists and researchers in protective suits taking water samples from polluted river.
Palabras clave
ecology,
research,
water,
sample,
analysis,
biologist,
environment,
pollution,
professional,
river,
science,
scientific,
scientist,
biology,
chemical,
equipment,
occupation,
outdoors,
ecologist,
expertise,
method,
substance,
analysing,
measuring,
test,
tube,
nature,
people,
working,
person,
male,
organism,
testing,
female,
group,
chemist,
quality,
researcher,
collecting,
examine,
polluted,
pollute,
protective,
taking,
glove,
toxic,
teaching
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