Word: fuel
(lookup in dictionary)
(lookup stats)
Dates: all
Sort By: most recent first
(reverse)
...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...
...Airplane manufacturers and airlines are working on ways to cut carbon emissions by raising fuel efficiency - building lighter and more aerodynamic planes, towing jets on the ground, and improving engine capacity. Designers are looking at running planes on biofuel, and Virgin Atlantic head Richard Branson has promised to build a biofueled jet by next year. But industry experts believe such incremental changes could improve efficiency by 1% or 2% a year at most, while passenger miles are set to grow at 5% to 6% annually. "We're left with a sustainability gap," says Roger Gardner, chief executive of OMEGA...
...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...
...think there's any way you can manage for a global effect locally," says Bruno, the author of the UNC report. He thinks the root cause of disappearing coral is, in the end, climate change, which can be addressed only by a worldwide effort to cap fossil-fuel use and pass stringent climate change legislation. "If we only manage locally, [we] will be totally overwhelmed over the next century...
Shannon spent five hours with a team of about 200 engineers and mission management folks going over the data on Endeavour's gouge, caused by the seemingly unstoppable shedding of foam insulation off the external fuel tank during launch. The gouge was determined to be of a size and in a location that would not create danger to the crew or ship. Shannon says the vote was not unanimous but "pretty overwhelming" for Endeavour to return home without repair...