posted on Jan, 8 2008 @ 11:22 AM
You don't need a secret government project spewing greenhouse gasses out of aeroplanes to create "chemtrails" for that effect. Normal airliners
Whether the jet set should grab a hair shirt over global warming is, well, a heated topic. The airline industry insists commercial airplanes,
when tracked by the fuel needed per kilometre travelled per passenger, are on par with a fuel-efficient hybrid car. Air travel is responsible for
about 2 per cent of global-warming emissions.
The controversy stems from the fact that high-altitude emissions - from nine to 13 kilometres up for subsonic flights and higher for supersonic -
cause disproportionately more warming than those at ground level, anywhere from 50 per cent to four times as much
, making its global-warming
role more significant than its emissions tally alone would indicate.
Part of the worry is due to contrails, the thin vapour trails from jets that crisscross the sky above many of the world's most-travelled air routes.
Contrails resemble artificial cirrus clouds, trapping heat, although there is no scientific consensus about the size of their leavening effect on
global warming. Please visit the link provided for the complete story.
More information in the following thread:
Aircraft contrails contributing to global warming?
"Chemtrails" are merely an obfuscation of actual reality. Whilst tin-foil hatters are getting all "the sky is falling" over it and blaming the
government, corporations like Boeing and Airbus get off scott-free with not developing better planes that fly efficiently at lower altitudes, thereby
mitigating the effect of persistent contrails on the climate. After all, people are pointing the finger towards "chemtrails" and their government