War on the Planet: Enviros Sue over Pollution from Airliners
April 22, 2016
Michael Beisecker / Associated Press & Gar Smith / Earth Island Journal
A coalition of environmental groups has sued federal regulators over long-sought pollution standards for airliners and cargo jets. A UN panel has called for a 4 percent cut in fuel consumption starting in 2028 but the rule would not apply to take-offs and landings, when aircraft burn the most fuel. Jets have been crossing the skies since the 1950s, but scientists only began to notice signs of climate change occurring beneath well-traveled jet routes in the late 1990s.
Environmental Groups Sue over Pollution from Airliners
Michael Beisecker / Associated Press
WASHINGTON (April 12, 2016) -- A coalition of environmental groups sued federal regulators Tuesday over long-sought pollution standards for airliners and cargo planes.
The Center for Biological Diversity and Friends of the Earth filed a lawsuit in US District Court in Washington. The groups allege the Environmental Protection Agency has unreasonably delayed for years using the Clean Air Act to enforce limits on heat-trapping greenhouse gas emissions from aircraft.
A United Nations panel in February proposed an average 4 percent reduction in fuel consumption during the cruise phase of flight starting in 2028 when compared with planes delivered in 2015. However, planes burn the most fuel during takeoffs and landings, while cruising at high altitudes is already the most fuel-efficient phase of flight.
Environmentalists have criticized that proposed reduction as too modest to significantly curb climate change, and are pushing the EPA to enact more stringent standards for domestic aircraft. Jet engines have a disproportionate effect on global warming compared to other pollution sources because the harmful gasses are released at high altitude.
Aviation accounts for about 5 percent of global carbon emissions, with US-owned airliners emitting about 30 percent of all aircraft pollution worldwide. While carbon emissions from land-based sources are largely in decline, pollution from airplanes is projected to triple by 2050 without stricter limits, the environmental groups say.
"Airplanes' skyrocketing climate pollution requires urgent action, not more foot dragging from the Obama administration," said Vera Pardee, a lawyer for the Center for Biological Diversity. "The EPA has dawdled for almost a decade, even as airplane emissions are on track to spiral out of control. We can't afford more denial and delay in tackling this high-flying threat to our climate."
EPA spokeswoman Laura Allen said Tuesday the agency would not comment on pending litigation.
The groups first filed a legal petition in 2007 urging the EPA to reduce air pollution from aircraft. A federal judge later ruled that the EPA is required to address aircraft emissions under the Clean Air Act. EPA has set 2018 as the earliest possible date for it to issue its final regulations, which the environmental groups say is too long.
The newest Boeing and Airbus designs already meet the proposed international efficiency standards. If adopted as currently proposed, aircraft manufacturers would be allowed to continue selling older, less efficient designs for years to come. Airliners already in use would be exempt from the new standards altogether, ensuring that even dirtier planes could continue to fly for decades.
"The evidence becomes clearer every day that airplanes significantly accelerate climate disruption," said Marcie Keever, legal director for Friends of the Earth. "The Obama administration must act immediately to curb aircraft's significant contribution to greenhouse gas emissions worldwide."
Follow Michael Biesecker on Twitter at https://twitter.com/mbieseck and find his work at http://bigstory.ap.org/content/michael-biesecker
Copyright 2016 The Associated Press. All rights reserved.
Oil Spills in the Sky
How Jet Aircraft Are Polluting the Skies and Changing the Weather
Gar Smith / Cover story: Earth Island Journal
Jet contrails are changing the weather
and the number of jetliners could double in 20 years.
Why isn't this an issue?
-- Earth Island Journal, 1997
(Summer 1997) -- Viewed from space, there are four unmistakable signs that Earth is inhabited by humans: sprawling cities, forest fires, disappearing lakes, and aircraft contrails.
With 10,000 large commercial aircraft flying today and the number expected to double by the year 2020, contrails (short for "condensation trails") pose a growing environmental threat. Commercial jets have been crossing the skies since the 1950s, but scientists only recently have begun to notice evidence of climate change occurring beneath well-traveled jet routes.
One of the world's most troubled routes, the North Atlantic Flight Corridor (NAFC) lies between 45 and 65 degrees north latitude and runs almost entirely over water. In 1990, between 700 and 800 aircraft traveled this route between the US and Europe each day -- amounting to more than 200,000 flights per year.
Among the first to sound the climate change alarm was Stanley A. Changnon of the Illinois State Water Survey. In 1981, Changnon pointed out that the Midwest had grown cloudier since the 1960s and that the greatest changes had occurred in regions marked by heavy jet traffic.
University of Utah atmospheric physicist Kuo-Nan Liou found that high-level cirrus clouds in the skies above Salt Lake City had intensified by 5 to 10% between 1948 and 1984 -- all major air-traffic hubs.
On the East Coast, Penn State meteorologist Tom Ackerman detected evidence of changes in surface temperature consistent with an increase in high-level cloudiness beneath the flight route connecting major cities of the east and west coasts.
In 1994, NASA scientists using GOES-8 satellite measurements reported that "in certain heavy air traffic corridors, cloud cover has increased by as much as 20%." In its May 1996 study, "Atmospheric Effects of Aviation," NASA estimated that subsonic flights in the NAFC had increased atmospheric soot by 10%, sulfur oxides (SOx) by nearly 10% and nitrogen oxides (NOx) from 10 to 100%.
Fry the Friendly Skies
Transatlantic jets burn between 2.5 and 3 tons of fuel per hour. In 1988, commercial aircraft consumed an estimated 70% of all jet fuel (with military and business craft accounting for another 24%). The world's aircraft currently produce about 3% of the carbon dioxide gases attributed to human activity.
During take-off, a jumbo jet can devour 2 million liters (528,344 gallons) of air per second. In the first five minutes of flight, a commercial airliner can burn as much oxygen as 49,000 acres of forest produce in a day. According to Department of Transportation figures, flying a Boeing 747-400 from Washington, DC to San Francisco burns 17,232 gallons of jet fuel. (Fuel efficiency: 6.7 mpg.)
A Boeing 747 averages 32 minutes taxiing, taking off and landing. During this time, it can generate 190 pounds of NOx -- equal to the amount produced by driving a car 53,500 miles.
In addition to producing vapor trails that can stretch thousands of miles across the sky, jet exhaust also triggers the formation of artificial clouds by "seeding" the atmosphere with cloud-forming aerosols -- droplets of sulfuric acid and particles of soot.
While NASA's tests of jet engines at ground level found that less than 1% of the sulfur produced left the engines in the form of cloud-forming sulfuric acid droplets, researchers were startled to discover that, at jet-cruising altitudes, acid droplets accounted for at least 10% of the sulfur emissions.
The NOx ejected by jet engines contributes to global warming by helping to create ozone clouds that trap heat in the troposphere. In 1996, aircraft generated nearly half the NOx found in the mid-latitudes of the Northern Hemisphere between 26,000 and 40,000 feet, according to estimates cited by Ulrich Shumann of the DLR Institute in Oberpfaffenhofen, Germany.
During the day, contrails either can reflect heat back into space (the Albedo Effect) or trap heat below (the Greenhouse Effect). When jets travel at night, however, contrails only trap heat in the lower atmosphere. University of Wisconsin climatologist David T. Travis theorizes that this may explain an unusual narrowing of daytime and nighttime temperatures recorded across the US.
Contrails have the potential to change local and national weather patterns, as well. Temperature differences between ocean and land surfaces heavily influence circulation patterns in the atmosphere, and warmer land masses can increase the frequency, direction and intensity of winds and storms.
University of Munich meteorologist Werner Metz has observed that "aircraft emissions are the only significant man-made source of pollutants in the upper troposphere and in the stratosphere."
In a 1993 issue of the Journal of Geophysical Research, Metz concluded that the best way to protect the stratosphere would be to move all transatlantic jet routes at least 2.5° South (to take advantage of a higher troposphere at that latitude) and lower cruising altitude by 6,000 feet. "This would result in a decrease in stratospheric NOx emission down to 9%," Metz calculated.
A Growing Problem
The Environmental Defense Fund (EDF) reported in 1994 that aviation fuel use and emissions were growing faster than other areas of energy use. While average world energy consumption rose 2.8% percent between 1983 and 1989, the annual use of aviation fuel crept up by 3.9%.
The EDF estimates that, in 1990, civil aviation consumed 133 million tons of fuel and generated four to 2 million tons of CO2.
According to a 1996 analysis by Boeing researcher Stephen L. Baughcum, in 1990, airline and cargo flights burned more than 10 billion tons of jet fuel and generated 125.6 million tons of NOx .
Baughcum estimated that military aircraft consumed 912 million tons of fuel and produced 21.4 million tons of NOx. The global total for 1990 came to 14.8 billion tons burned, which produced 160 million tons of NOx and 124.5 million tons of CO2.
The EDF has estimated that, even with a projected tripling of fuel efficiency, "fuel consumption and CO2 and water vapor emissions will jump more than six-fold by 2100." As in the case of automobiles, any efficiency gains in the air will be overwhelmed as the number of aircraft grows ten-fold over the next half-century. (The aircraft industry foresees these numbers doubling by the end of the 21st century.)
According to the EDF's scenario, N0x emissions from subsonic aircraft could more than triple in the next century, while N0x and CO2 could "lead to as much as 10% of human caused global warming by 2050."
Meanwhile, a 1996 Natural Resources Defense Counsel survey has found that 75% of 50 major US airports we are undergoing expansion or planning to expand operations. Airport development promises to bring more air and noise pollution to nearby neighborhoods, while putting added stress on adjoining open spaces and wetlands.
The Amicus Journal points out that airports "are exempt from some of the environmental standards that apply to industrial facilities" and also are exempt from the Community Right-to-Know Act requiring public disclosure of toxic hazards.
Under international agreement, jet fuel is not taxed -- giving the airline industry subsidy to pollute. The Center for International Climate Change and Environmental Research in Oslo (CICERO) has suggested funding climate protection efforts by taxing fuel and passengers. A per-passenger tax of $8.70 would produce $10 billion by 2003. CICERO has proposed that the UN's Global Environment Facility manage the revenue.
The Coming Superjets
By the year 2015, NASA estimates that aircraft fuel consumption will more than double, NOx emissions will nearly double and CO2 emissions will grow by 50%. But NASA's figures specifically (and inexplicably) exclude the impacts of a "High-Speed Civil Transport (HSCT) fleet."
The new generation of supersonic HSCTs planned for the 21st century clearly will add to the impact of the world's growing fleet of subsonic aircraft. The prototype HSCT now on the drawing boards could carry 300 passengers 60,000 feet above the Earth at twice the speed of sound. The first HSCT's could be heading for the stratosphere as early as 2005.
Science News reports that superjets, ferrying VIP passengers between Tokyo and Los Angeles in under five hours, would create ground-rocking sonic booms capable of causing physiological harm or structural damage. With 500 ocean crossings each day, Science News predicts that superjets could have a serious impact on "whales, seals, sea lions and sea otters," not to mention "passengers on cruise ships and residents of Islands near ocean flightpaths."
In the 1960s, environmentalists grounded US plans to build a Supersonic Transport (SST) because of the damage the planes would wreak on the ozone layer. The only SSTs ever built were 13 British-French Concordes. The stakes are even higher as environmentalists prepare to fight the jet battle once again.
The World's Dirtiest Jets
According to April 1992 commercial aircraft and missions estimates cited by Boeing researcher Stephen L. Baughcum, the biggest gas guzzler in the sky was the Boeing 747-200, which burns 26,359,000 kilograms (29,000 tons) of fuel a day.
In 1992, Boeing 747-200s accounted for 10.4% of the world's daily use of jet fuel. Three Boeing planes (the 747-200, 747-107 and 727-200) accounted for 27.8% of all jet fuel burned.
Boeing's 747s are powered by some of the most polluting engines in the air. A NASA Emissions Index (the EI measures grams of emissions per kilogram burned) helps identify the world's most polluting aircraft.
The world's dirtiest aircraft (with EIs of 24 above): the Boeing 747-400, DC-10, Airbus A300, Lockheed 1011, Boeing 747-300, Boeing 747-SP, DC-8, Boeing 747, Ilyushin 62, Ilyushin 86, Fokker 100 and Ilyushin 72.
The world's cleanest planes (with EIs below 10 in all categories): DC-9, BAE-146 and Tupolev 134.
During his recent visit to China, Vice President Al Gore signed deals to build two US products in the world's most populous country: Buick sedans and Boeing passenger jets. In order to arrange sufficient "pollution credits" to offset these impacts, the US would have to plant several million trees.
– Gar Smith
The Sky's the Limit
Air travel accounts for about 10% of the modern transportation industry worldwide, with millions of people paying huge amounts of money to travel billions of kilometers. In the US, aircraft manufacturing ranks seventh in dollar value of all exports and, directly or indirectly, employees thousands of people in high-skill, high-paying jobs.
The Boeing Company expects air travel to increase by 70% over the next 10 years and 180% over the next 20 -- as it allows underdeveloped countries to leap into a modern transportation system without having to build expensive roads, bridges or ports.
Boeing and Airbus Industries are the two remaining gigantic corporations competing ferociously for the trillion-dollar aircraft market expected to develop over the next two decades. Experts predict that more than 13,500 heavy jets -- each ranging in cost from $32-171 million -- will be built, dwarfing the size of the fleet now in service.
With such profits on the horizon, there appears to be little industry incentive to consider the environment.
– Jim Scanlon
Posted in accordance with Title 17, Section 107, US Code, for noncommercial, educational purposes.