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English: The steam plumes of Frimmersdorf powerstation (left), Neurath powerstation (middle) and Niederaußem powerstation (right) rise through the cloud layer.

These clouds contain generally condensed water steam just like natural clouds. However, there is a certain amount of CO2 coming up from the powerstation which is invisible.

Picture taken shortly after taking off at Cologne-Bonn Airport, Runway 14L and making a right turn, flying pretty exactly westwards. Aboard flight AB9250 to Mallorca, Registration D-ABBQ, looking northwards.
Deutsch: Die Dampfwolken der Kraftwerke Frimmersdorf (links), Neurath (Mitte) und Niederaußem (rechts) durchstoßen die Wolkenschicht.

Diese Wolken bestehen hauptsächlich aus kondensiertem Wasserdampf - genau wie natürliche Wolken. Aufgrund der Rauchgasentschwefelung sind die Abgase für einen natürlichen Schornsteinzug zu kalt. Daher werden die behandelten Abgase in die Kühltürme geleitet, der Auftrieb der warmen Kühlwasserwrasen sorgt für genügenden Zug. Somit sind die Wolken ein Gemisch aus Wasserdampf und Abgasen (CO2), die Abgase selbst sind an wärmeren Tagen ohne Wrasenbildung sichtbar.

Aufgenommen kurz nach dem Start auf dem Flughafen Köln-Bonn Startbahn 14L und einer Rechtskurve auf westlichem Kurs. An Bord von Flug AB9250 nach Mallorca. Blickrichtung Norden.
Date 1 December 2009(2009-12-01), 11:23
Source Own work
Author Arne Hückelheim
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Arne Hückelheim (author)

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51° 2' 52" N, 6° 35' 26" E

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EXIF data:
File name frimmersdorfwolke7.jpg
Size, Mbytes 2.43044140625
Mime type image/jpeg
Camera manufacturer Canon
Camera model Canon EOS 1000D
Orientation of image 1
Image resolution in width direction 72
Image resolution in height direction 72
Unit of X and Y resolution 2
Exposure time 1/400 sec (0.0025)
F number f / 14
Exposure program 2
ISO speed rating 200
Exif version 0221
Lens focal length 55 mm
Date and time original image was generated 2009:12:01 11:23:29
Date and time image was made digital data 2009:12:01 11:23:29
Meaning of each component 
Shutter speed 8.625
Aperture 7.625
Exposure bias 0
Metering mode 5
User comments
Supported Flashpix version 0100
Color space information 1
Exif image width 3888
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InteroperabilityOffset 9478
Focal plane X resolution 4438.35616438
Focal plane Y resolution 4445.96912521
Focal plane resolution unit 2
Interoperability index R98
Interoperability version 0100
Type of image Canon EOS 1000D
Firmware version Firmware Version 1.0.5

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