A side view of a doctor conducting a filtration test on water from an urban source, with lab equipment and samples spread out on the bench.
Palabras clave
paper,
health,
hand,
colours,
science,
glasses,
laboratory,
research,
chemistry,
biology,
aquarium,
chemical,
biotechnology,
biochemistry,
experiment,
exam,
alkaline,
laboratory,
analysis,
solution,
meter,
scientist,
tap water,
sample,
reaction,
analysing,
examine,
engulfed,
indicator,
measure,
test,
maintenance,
urban area
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