The new system also includes enhanced venting of smoke and gas from inside the battery to outside the plane.
Some chemicals showed a possible link to breast cancer, including benzene, 1, 3-butadiene, and ethylene oxide, which are chemicals found in tobacco smoke, gas fumes, and exhaust from cars.
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The cause of the blaze is not yet known, but it began during the night, after the factories had closed for the day, and sent out smoke and gas that suffocated victims as they ran down stairs, officials said.
President Thein Sein's office said in a statement that police had used water cannon, tear gas and smoke bombs to disperse the crowds.
The sky just lit up in orange and red, " he said, "We could smell something in the air, we didn't know if it was gas or smoke.
Masked protesters attacked police guarding government buildings amid the smoke of burning tires and exploding tear-gas canisters.
The air was thick with smoke, which some protesters said was from tear gas that officers lobbed.
In the absence of either option, the gas is flared, meaning it literally goes up in smoke in the form of all types of types emissions.
The bowl of flames has been burning, so the legend goes, since the 1920s, when a couple of hunters sat down for a smoke and one threw away his match, suddenly igniting the leaking gas right next to him.
But if shale gas starts to replace natural gas in Europe, all these plans could go up in smoke.
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As they ran away from the smoke to one direction, they found themselves running into another cloud of tear gas fired by policemen blocking the road ahead.
Dr Siegfried believes the hormone may exacerbate the effects of exposure to tobacco smoke - and to other substances known to be linked to lung cancer such as the gas radon.
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