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The Emergencies Ministry said that while the amount of hydrogen sulfide in the air was above acceptable levels for a short while, levels of sulfur dioxide are within the acceptable range.

Gazprom Neft, which runs the plant, however, reportedly denied there was an accident.

Amid the conflicting and shifting statements, Moscow’s over 11.5 million residents have been left wondering who to believe.

Near the plant, a thick, hazy cloud hung in the air. A local resident posted this video, complaining that they suffer from these kinds of emissions often.

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