The Great Polluters
|Forces International|| |
THE GREAT POLLUTERS
We are willing to live with their pollution, but we can't smoke inside
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The number of heavy passenger LTOs at the Vancouver International Airport in 1990 was 101,434. We report in the table below the complete list of LTOs divided by aircraft category.
|As it can be seen, the total number of LTOs for all categories is much higher than the number of heavy passenger LTOs. For simplicity we leave to thereader the option of downloading the study to calculate the total emissions for himself, while we focus on the most popular category of airplanes.
So, let us consider the LTO emissions of a Boeing 747-400 (engines: PW4056), and the emissions of a McDonnel Douglas DC9-80 (engines: JT80-217C)
|AVERAGE LTO HEAVY CARRIER EMISSIONS:
CARBON MONOXIDE (CO): 22.90 lbs - NITROGEN OXIDE (NOx): 70.70 lbs - HYDROCARBONS (HC): 3.34 lbs
TOTAL MEASURED EMISSIONS: 96.94 lbs
Since we want to concern ourselves mainly with the emissions of an airplane while it is on the ground (where the heaviest concentration of pollutants sit), it is necessary to further reduce these figures by 50% (see above), thus the total measured ground emissions are about 48.5 lbs.
This does not seem much, if we consider the size and the power of these carriers. However, let us now consider the daily number of LTOs at the Vancouver airport:
101,434 : 365 = 278 daily LTOs
Then let us multiply the daily LTOs by the emission weight: 278 x 48.5 = 13,483 lbs per day ground emissions.
Now it is time for some important consideration:
It is therefore quite reasonable to double the amount of these emissions and still end up being on the conservative side when considering the exposure to pollutants at this airport.
This brings the total amount to about
9,855,000 LBS (49,275 TONS) PER YEAR.
Isn't it ironic that the "smoke-free", "clean air" of the Vancouver Airport facilities is pumped in from this kind of outside environment" Let us see now how many cigarettes per hour the figureabove equates to:
(This is based upon the assumption that all the 21 milligrams constituting the average emission of a cigarette are released in the atmosphere as opposed to being partially retained by the body, which is thecase in real life.)
Except for nicotine, the byproducts ofafter-combustion aircraft fuel and cigarettes are the same. The difference is one of scale -- tons versus milligrams.
We have often been asked: "how many cigarettes equal the take off of an airplane""
Let us say that the brand new, absolutely-smoke-free 747-400 leaves behind the equivalent of 3,224,000 cigarettes.