A specialist engineer at a treatment pond is checking the water quality of the treated pond.
Schlüsselwörter
adult,
analysis,
analysing,
biochemistry,
biologist,
biology,
chemical,
chemistry,
conservation,
dirty,
ecology,
ecosystem,
engineer,
environment,
environmental,
environmental conservation,
conservationist,
examining,
expertise,
glove,
health,
helmet,
horizontal,
industrial,
inspector,
lake,
liquid,
male,
microbiology,
monitoring,
one person,
outdoors,
person,
photo,
pollution,
professional,
protection,
quality,
research,
safety,
sample,
science,
scientific,
scientist,
scrutiny,
test,
testing,
tube,
water
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