Text file: 5370.txt
author: Marjan Bizilj
downvotes: 4
end consideration date: 2014-01-17
id: '5370'
number comments: 8
number views: 4429
proposal type: Competent authority response
response: "Response from the Ministry of Agriculture and Environment\nThe trails of\
  \ aircraft often seen in the sky are caused by the normal condensation of water\
  \ vapour from aircraft exhaust. We have been witnessing such trails since the existence\
  \ of jet passenger transport. The hot exhaust, which includes fine particles from\
  \ the combustion of conventional fuel and water vapour, mixes with the cooler surrounding\
  \ air. When the air mixture, enriched with additional moisture and particles, cools\
  \ sufficiently, tiny water droplets or crystals form on the particles, which are\
  \ observed as aircraft tracks. No additional chemicals are needed to form these,\
  \ just moisture and particles from normal aircraft exhaust. The more humid the ambient\
  \ air in which the trails form, the longer they persist, spread and decompose more\
  \ slowly. The reason why aircraft tracks are more visible on certain days and disappear\
  \ quickly on others is simply due to the different properties of the air masses\
  \ through which the aircraft flies. Thus, sometimes we see that the trails (white\
  \ lines) are very thin and disappear soon after the aircraft, while at other times\
  \ the trails behind the same aircraft remain in the sky, get thicker and, if there\
  \ are many aircraft overflights and thus many trails, eventually cover the whole\
  \ sky. Further evidence that it is not some special chemical is provided by the\
  \ cases where the trails are broken because the humidity varies between the different\
  \ segments of the flight. This is evident for all aircraft flying approximately\
  \ the same route at the time.\nMeteorologists consider that the aircraft tracks\
  \ pointed out by some movements and individuals and written about in online forums\
  \ and blogs are normal condensation trails (or Contrails for short). To date, there\
  \ are no serious publications in scientific journals in the fields of meteorology\
  \ and atmospheric physics or chemistry that confirm the introduction of chemicals\
  \ into the atmosphere over large areas to create artificial chemtrails. Of course,\
  \ anyone can comment online on celestial phenomena, even if they are not backed\
  \ up by proper explanations and evidence. Similarly, the reasons for chemtrail releases\
  \ usually given by concerned individuals and movements (e.g. controlling population\
  \ growth, reducing the effects of global warming, etc.) are mostly meaningless.\n\
  Of course, it should be noted that attempts are being made in some countries around\
  \ the world to artificially influence the weather. The World Meteorological Organisation\
  \ even has a special Commission to monitor attempts to influence the weather artificially.\
  \ Their main purpose is to intensify rainfall in arid areas or to defend against\
  \ hailstorms. The latter has also been carried out in Slovenia in the past, but\
  \ meteorologists are not in favour of it because of its unproven effectiveness.\n\
  As regards the proposed tax on chemical emissions, we do not believe that it can\
  \ be introduced, as these emissions do not seem to exist. However, CO2 emissions\
  \ from aviation are included in the European greenhouse gas emissions trading scheme.\n\
  Attribution:\nJet passenger aircraft fly at altitudes between 10 and 14 km. The\
  \ relative humidity at flight altitude alone determines how pronounced and how long-lasting\
  \ the contrails are in the sky.\nThe opinion of the Slovenian meteorological profession\
  \ is published at: http://www.meteo-drustvo.si/data/upload/Contrails_21032010.pdf\n\
  An even more comprehensive explanation (a joint statement by the US Environmental\
  \ Protection Agency (EPA), NASA and NOAA) can be found at: http://www.faa.gov/regulations_policies/policy_guidance/envir_policy/m...\n\
  This is also mentioned on wikipedia: http://en.wikipedia.org/wiki/Chemtrail_conspiracy_theory\n\
  Of course, no aircraft exhaust is \"clean\", and we are not aware of any chemical\
  \ substances being deliberately added to the fuel. This issue was also raised in\
  \ the European Parliament in 2007, but has not stood up to critical scrutiny.\n\
  http://www.europarl.europa.eu/sides/getDoc.do?pubRef=-//EP//TEXT+WQ+E-...\nhttp://www.europarl.europa.eu/sides/getAllAnswers.do?reference=E-2007-...\n\
  \ "
response date: 2014-02-11
response due date: null
sent date: 2013-12-19
title: Tax on chemical emissions from aircraft
upvotes: 12
url: https://predlagam.vladi.si/predlog/5370
