The new aviation fuels are made from a widening variety of plant and other materials -- including municipal and industrial waste, algae and corn crop residues -- that don’t require drilling for new oil.
Passengers flying out of Denver International Airport each contribute up to a ton of heat-trapping carbon dioxide before reaching their destinations as airplanes burn fossil fuels.
Federal government-backed researchers are working toward a target of producing 3 billion gallons a year of this “sustainable aviation fuel” by 2030 and 35 billion gallons by 2050 – enough to meet the projected U.S. demand as air travel at least doubles. President Joe Biden has declared aviation and shipping fuel must be carbon-neutral by 2050. The Paramount refinery in California already produces non-oil fuel for flights out of Los Angeles International Airport.
Every time a super-charged hurricane hammers the southeastern coast “there is increased urgency,” U.S. Department of Energy mechanical engineer Zia Abdullah said at NREL this week. “If we use renewable carbon, the airplane is still going to put out carbon dioxide. But there’s no net new carbon. That’s where we want to go. We want to set up a cycle of renewable carbon – and not have new net carbon coming into the atmosphere. This will mean that, in the future, we won’t have rising levels of carbon dioxide.”
Flying without burning new fossil fuels also could be done using hydrogen fuel or electricity, researchers say, though these face huge hurdles. And a Dutch team in 2016 demonstrated solar possibilities, flying a solar-panel-laden Solar Impulse aircraft around the world in 505 days. The aircraft weighed 2.4 tons and flew at an average speed of 45 mph.and requires 106 billion gallons of aviation fuel, , according to aviation industry studies and International Air Transport Association data.
A passenger flying from Denver to Frankfurt contributes a share of roughly 1,635 pounds of carbon dioxide pollution.By comparison, the per-passenger pollution from ground travel burning a gallon of gas is about 19 pounds. Driving from Denver to Mexico City would release around 1,615 pounds of heat-trapping carbon dioxide — more than three times as much as traveling by plane.
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