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The aviation industry is responsible for 2.5% of the world's carbon emissions

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A new study indicates that the aviation industry is responsible for up to 2.5 percent of the world's carbon emissions (inhabitat.com) Daha Fazlası...

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ExCalbr
Victor Engel 1
When they calculate the 2.5% are they deducting the fuel that would otherwise be used? I'd like to see a comparison of the fuel used by a 737, say, between Houston and Dallas, and the fuel used by cars transporting the same number of people/luggage.
ExCalbr
Victor Engel 1
I guess I just needed to do a quick search:
http://paullaherty.com/2012/05/25/boeing-737-vs-toyota-prius-this-might-surprise-you/
WALLACE24
WALLACE24 1
That's fuel efficiency, not the same as carbon emissions.
ExCalbr
Victor Engel 1
Certainly not the same, but related. Fuel efficiency is directly proportional to carbon emissions for a given fuel type. Automobiles and planes both use hydrocarbon fuels last time I checked, with some notable exceptions. So the comparison is mostly valid.
WALLACE24
WALLACE24 1
To my knowledge airplane engines have no anti pollution devices as do vehicles and you say it makes no difference? Our modern diesel powered trucks put out water vapor for emissions. Particulates are virtually unmeasurable on them.
As I said earlier, would it make any difference if airplanes put out 10%? Not to me.
ExCalbr
Victor Engel 1
Whether an engine has anti-pollution devices plays no part in carbon usage, except that unburned fuel is wasted energy. Usually anti-pollution devices, like, for example, catalytic converters, facilitate burning whatever fuel didn't burn in the combustion chamber. Either way, carbon in equals carbon out. Without anti-pollution devices, the carbon out includes CO2, CO and various hydrocarbons. With anti-pollution devices, CO is reduced, hydrocarbons are reduced and CO2 is increased. But total carbon remains the same.

The vast majority of automobiles and planes both use hydrocarbon fuels, and the CO2 production per energy released by the fuel is almost identical between gasoline and jet fuel.

If you believe diesel fuel engines produce nothing but water vapor, you are sorely mistaken. Diesel has a lot of carbon, and while modern diesel engines don't produce soot (which comprise the particulates) like the old ones did, they still produce a lot of CO2 (not a particulate). The carbon has to go somewhere, and efficient engines produce a lot of CO2 when the fuel is carbon-based. There are not many fuels that are not carbon-based. An example would be hydrogen. Hydrogen engines produce water vapor emissions (and nitrogen oxides) but no carbon emissions. Diesel engines produce a lot of CO2, whether or not they produce particulates.

Jet engines, like diesel engines, used to put out a lot more soot than they do these days.
WALLACE24
WALLACE24 1
Didn't say pollution devices changed carbon usage. They change emissions to H2O and CO2 (black carbons eliminated). Jets emit HC, CO, NOx, SO2, and particulate matter. Pick your favorite carbon or other product of hydrocarbon fuels and breathe deep cause we're gonna be burning them for a long time. Lol. Have a good day. I'm going flying in this clear COLD air.
ExCalbr
Victor Engel 1
You said, "Our modern diesel powered trucks put out water vapor for emissions." False. They also put out CO2. Your omission of this point is relevant to the conversation, which is about carbon. The CO2 is where the bulk of the carbon goes - both for automobiles and airplanes.
WALLACE24
WALLACE24 1
Well duh. What burns fuel faster with no after treatment than a jet engine?
linbb
linbb 2
For the amount of travel and freight hauled it isn't very much. Lots more come from China and other areas so don't see a problem here other than some Al Gore followers will am sure.
WALLACE24
WALLACE24 2
I sure don't have a problem with airplanes. First of all I don't buy in to the Al Gore hype. I just think it's a big duh because to my knowledge there no real systems to reduce their emissions and the fleet is growing every year as more and more people have access to travel.
linbb
linbb 2
And by the way how would anyone suggest one travels? How bad do the cruse ships, cargo ships and such pollute?
canuck44
canuck44 0
The Carbon Scam is losing support as data become available. They show that in spite of rising CO2 levels there has been no global warming for two generations, no rise in the oceans, no loss of Arctic ice, no increase in extreme weather, no loss of polar bears, no acidification of the oceans or any other alteration of previously claimed environmental maladies.

Alternatively, there has however been a marked increase in forestation, unemployment in the coal industry, fattening of Al Gore's bank account (it appears they were needed to sustain his appetite), increase in junk science led by the EPA and a huge burden on the US taxpayer directly and indirectly and a saturation of the hypocrisy index by the perpetrators.

Since it dipped to the high 40's here last night, I did burn all my yard debris, Christmas tree and holiday cardboard in the hope that the alarmists might have been right. In spite of smoke and CO2 it is still cold here.
WALLACE24
WALLACE24 1
Can't argue with that. Aviation = 2.5 % of carbon emissions---SO? Would it matter if it was 10%?
WALLACE24
WALLACE24 2
BTW, every couple weeks I go out with the backhoe and knock down a dead oak tree to burn in my fire pit because I like cocktails and fire together. Lol

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