Water with hydrogen sulphide, flows from oil wells, pollution, ecology of the Black Sea, Bulgaria, village Tyulenovo
Palabras clave
water,
hydrogen,
spring,
nature,
mountain,
resort,
russia,
mineral,
hot,
summer,
landscape,
source,
underground,
island,
north,
natural,
travel,
lake,
slope,
sochi,
oil production,
side effect
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