Word: travellings
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...best to run Gaza responsibly. Not only is it iniquitous that the U.S. and Europe have sidelined the elected government, but it is also extremely cruel that we have been complicit in Israel's blockade, which is further impoverishing the people of Gaza. They have as much right to travel abroad and trade with the outside world as we or the Israelis do. Tony Davies, EXETER, ENGLAND...
...Airplanes operate on petroleum fuel, which means they release large amounts of carbon dioxide when they fly. Commercial air travel is currently responsible for a relatively tiny part of the global carbon footprint -just 3.5% of total greenhouse gas emissions, according to the Intergovernmental Panel on Climate Change. But the unique chemistry of high-altitude jet emissions may produce an additional warming effect, while the explosive growth in air travel makes it one of the fastest-growing sources of carbon gases in the atmosphere. And unlike energy or automobiles, where carbon-free or lower-carbon alternatives already exist, even...
Given the rage that air travel can provoke in even the most tranquil among us these days, it may be surprising that riot police aren't a more regular feature at airports. But Sunday's pitched battle between roughly 500 environmental activists and a phalanx of baton-wielding police at London's Heathrow airport wasn't about long lines, delays, lost luggage or missed connections. Instead, the protesters - who had demonstrated outside Heathrow all of last week - were trying to draw travelers' attention to the impact on climate change of the carbon gases emitted by the aircraft in which they...
...Even as carbon emissions from air travel grow rapidly, scientists are investigating claims that they may double the warming effect because of the altitude at which they're emitted. As jets soar they leave behind contrails, vapor threads of condensation that can persist for hours, especially in colder areas, and behave like high-altitude cirrus clouds. Those clouds seem to have a net warming effect, trapping heat in the atmosphere. Planes also create ozone, a greenhouse gas that has a stronger warming effect at high altitudes than low. The science is still being nailed down, but the side effects...
...Though there's no technological silver bullet, there are policy options available to manage air travel emissions such as carbon cap and trade schemes. But those won't be simple: Air travel was left out of the Kyoto Protocol on curbing emissions in part due to the complexity of assigning national responsibility for gases spewed by international flights. Just getting governments to share air space more freely, which would allow planes to fly more direct routes and cut fuel consumption, has proven to be an ongoing headache...