2007-04-05 10:58:10 · 8 answers · asked by GARY G 1 in Environment
Worldwide it' about 4.6% - in some counries it's more and in others it's less. The amount is growing and has doubled in the last 20 years and is expected to double again in the next 30 years.
This is a good website that tells you a lot more about aviation and global warming - http://www.responsibletravel.com/copy/copy101993.htm
2007-04-05 14:42:20 · answer #1 · answered by Trevor 7 · 0⤊ 0⤋
We don't know for certain that humans add to global warming at all. The earth would be warming even if there were no humans. We may be contributing to warming - if so it's a small percantage of the total.
2007-04-05 18:44:15 · answer #2 · answered by Anonymous · 0⤊ 1⤋
7% i saw Al Gore say it on the tonight show. That sounds small, but compare the number of planes to the number of cars if pretty shocking. You'd think jet fuel might come in non diesel this century. I still don't see why we don't fly zepplins, the hindenburg blew up because the germans were stupid enough to coat it in rocket fuel for waterproofing.
2007-04-05 18:28:22 · answer #3 · answered by imajiknation 2 · 0⤊ 0⤋
A great deal more than high speed electric trains. I remember seeing a government report that stated it was in the 8% - 11% range.
2007-04-05 18:46:05 · answer #4 · answered by Anonymous · 0⤊ 0⤋
The new Airbus A380, at full capacity, gets better gas mileage per person than most standard sedans at full capacity on our highways. Yet, it travels about 10 times as fast.
2007-04-05 18:15:08 · answer #5 · answered by The Don 1 · 2⤊ 1⤋
They don't add anything to global warming.
2007-04-05 18:23:26 · answer #6 · answered by Anonymous · 1⤊ 2⤋
A small fraction compared to over a billion automobiles. thousands of factories and power plants, and mega farms supplying billions of people with meat.
2007-04-05 18:10:50 · answer #7 · answered by Anonymous · 2⤊ 0⤋
According to some environmentalist so much that they should be banned.
2007-04-05 20:39:24 · answer #8 · answered by eric c 5 · 0⤊ 0⤋