17. When Eyjafjallajokull erupted on April 14, the diminutive but destructive Icelandic corker did us and unheralded favour. Believe it or not, all that ash swirling into the upper atmosphere was actually a minor boon to the war on global warming. About 11,000 European and international flights a day were canceled, and grounded aircraft don’t pollute. With air travel over much of the continent slashed by 60%, CO2 emissions from aviation fell by about 200,000 tons a day, according to data from the independent British research group RDC Aviation. Since the volcano is estimated to be issuing 150,000 tons of CO2 daily, Europe temporarily lowered its carbon footprint by about 50,000 tons a day. The reduction is a mere hiccup, of course. The savings is a little more than Luxembourg’s and a little bit less than Estonia’s daily output of heat-trapping gases. In the course of a year, the change will be almost imperceptible since, as the United Nations reports, humans produce about 73 million metric tons of carbon a day. With aviation emissions estimated at about 2% of the worldwide total, unless Eyjafjallajokull does what it did the last time it erupted – belching the Earth’s gaseous juices for more than a year, from December 1821 to January 1823 – then the halt won’t amount to much. But what the present storm cloud over Europe demonstrates is our growing dependence on a form of travel that, if unchecked, will swamp many of the reductions made elsewhere in the battle to combat global warming. The fact is, despite the falloff in passengers after 9/11, airplanes are the fastest-growing source of man-made greenhouse gases, according to a 2006 report by the European Federation for Transport and Environment. Cars still cough out far more greenhouse gases than aircraft, but according to the Aviation Environment Federation in Britain, flight emissions are growing six times as fast as tailpipe emissions. The most efficient way to slash these carbon emissions is to build high-speed electric trains, because they emit anywhere between a tenth and a quarter of aircraft greenhouse gases. The current situation according to the article is that;

Question

17. When Eyjafjallajokull erupted on April 14, the diminutive but destructive Icelandic corker did us and unheralded favour. Believe it or not, all that ash swirling into the upper atmosphere was actually a minor boon to the war on global warming. About 11,000 European and international flights a day were canceled, and grounded aircraft don’t pollute. With air travel over much of the continent slashed by 60%, CO2 emissions from aviation fell by about 200,000 tons a day, according to data from the independent British research group RDC Aviation. Since the volcano is estimated to be issuing 150,000 tons of CO2 daily, Europe temporarily lowered its carbon footprint by about 50,000 tons a day. The reduction is a mere hiccup, of course. The savings is a little more than Luxembourg’s and a little bit less than Estonia’s daily output of heat-trapping gases. In the course of a year, the change will be almost imperceptible since, as the United Nations reports, humans produce about 73 million metric tons of carbon a day. With aviation emissions estimated at about 2% of the worldwide total, unless Eyjafjallajokull does what it did the last time it erupted – belching the Earth’s gaseous juices for more than a year, from December 1821 to January 1823 – then the halt won’t amount to much. But what the present storm cloud over Europe demonstrates is our growing dependence on a form of travel that, if unchecked, will swamp many of the reductions made elsewhere in the battle to combat global warming. The fact is, despite the falloff in passengers after 9/11, airplanes are the fastest-growing source of man-made greenhouse gases, according to a 2006 report by the European Federation for Transport and Environment. Cars still cough out far more greenhouse gases than aircraft, but according to the Aviation Environment Federation in Britain, flight emissions are growing six times as fast as tailpipe emissions.  The most efficient way to slash these carbon emissions is to build high-speed electric trains, because they emit anywhere between a tenth and a quarter of aircraft greenhouse gases. The current situation according to the article is that;

Answer

Aircraft fuel efficiency is expected to decrease

Answer

High-speed electric trains are being developed

Answer

Aircraft are producing less greenhouse gasses than cars

Answer

Aircraft are producing more greenhouse gasses than cars.

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17. When Eyjafjallajokull erupted on April 14, the diminutive but destructive Ic...

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