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why is the color of smoke blue?
Blue spotlights are attached to the bottom of the large tower so that the smoke from the combined heat and power plant appears blue.Greetings from Saarbrücken in Germany
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why is the color of smoke blue?
Blue spotlights are attached to the bottom of the large tower so that the smoke from the combined heat and power plant appears blue.
Greetings from Saarbrücken in Germany