Running the trains had been more difficult on the Manhattan side of the river, the official said, because there wasn't sufficient power to operate ventilation fans to clear diesel fumes.

WSJ: Buses Back, But Subways Could Take Days Longer

Even late at night, residents can be kept awake by a nearby restaurant's loud pet goose, supermarket or restaurants' ventilation fans and freezers, temples or businesses setting off firecrackers to seek divine protection at ungodly but auspicious hours.

BBC: Taiwan's noise pollution dilemma

It is pitching a new ventilation system that would fill a mine with sensors, dampers and louvers along with variable speed fans that will send only the right amount of air to the mine tunnels.

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