What About Flying?

Susan Krumdieck's picture

I'm a Mechanical Engineer. I spend some of my time teaching the next generation of engineers what we know to be true, how to apply the fundamental laws to problems, and how to practice their art. If you ask me a good question, there are logical processes to provide a good answer.

Firstly, what is the question? The way to get clarity is to start with scientifically accurate observations, measurements and modelling. The scientists are clear - releasing fossil carbon into the atmosphere through fuel combustion is destabilising the energy balance of the earth’s surface. It’s pretty clear that this poses risks to human activities and ecosystem stability due to climate disruption and sea level rise. The science is also clear about the relative contributions of other human activities like clearing forests and agriculture.

As an Energy Engineering specialist, I can find the numbers for fuel use by different sectors and for different purposes. This can give ideas a bout relative contribution to the problem. However, as we know, relative contribution is deceptive. Relative contribution to the birth of a child? It can be pointless to argue about relative responsibilities when the point is that we have to take care of the baby.

Depending on how you calculate it, the carbon emissions per passenger can be the lowest for flying, or the most extreme. There is no question that private and freight road travel are responsible for the overwhelming burden of emissions. If we are getting distracted by air travel then we need to consider how to be more effective. Air travel has the potential to be a distraction in the vein of plastic shopping bags, residential compact fluorescent lights, and hybrid cars. Let’s focus. Flying in airplanes isn’t putting the climate at risk of rupture, extracting and burning unprecedented quantities of fossil fuels from ever more polluting sources is.

Percentage of USA long haul trips by purpose and mode (from RITA, US DOT)

Mode

Business

Commute

Pleasure

Personal Business

Other

Total

Air

17.8

1.5

6.7

4.7

1.9

7.4

Personal Vehicle

79.3

96.4

90.4

89.3

96.6

89.5

Bus

0.8

0.5

2.2

5.6

0.5

2.1

Train

1.6

1.7

0.5

0.3

0.1

0.8

The ability to travel a great distance at a great speed is an amazing modern development. The experience of flying is a miracle! To think about not flying is really difficult. Any given trip by airliner can be justified, rationalised or bargained for in the greater good. I think the real issue with air travel is the symbology of our civilisation’s expectations that it represents. This amazing miracle of capability is not appreciated and used frugally for the most important reasons. Rather, it is an expected convenience commodity available on demand by a civilisation of consumers.

In the distant future, if our civilisation has transitioned to manageable sustainability, they may indeed fly. However, if they have processes established to manage and control their un-sustainable use of the commons, they will have a strong shared value of sufficiency. They will understand essentiality, the difference between need and want. They will have organised ways to allocate limited resources to where it will do the most good. They will still fly, but it might be for the one trip of a lifetime. Flights might be mostly reserved for people who are experts on regenerating and restoring damaged areas or setting up recycling and retrofitting so they can help others set up their own local processes for sustainable operation. If people want to see relatives, then they live within a train ride.

If I choose not to fly, but rather drive or take a train, objectively there has been no change to the GHG emissions of the system. My behaviour within the transport system is very weakly related to GHG emissions unless my decision not to travel or my decision about mode actually changes the amount of fuel burned.

It is possible that the cumulative effect of millions of decision not to fly and to take the train instead would cause a reduction in the number of flights, and thus a reduction in the amount of fuel burned. This is the “consumer choice power” model of change. It definitely worked to get rid of 8-track tapes. But it did not work to phase out asbestos, lead in gasoline or ozone depleting CFC refrigerants and propellants. Extending any eventual carbon tax or EMS to aviation fuel would raise ticket prices and so presumably reduce demand. Since airlines are planning on continued growth, the effect would most likely be failure of some airlines and consolidation. This seems an unnecessarily painful way to achieve reduced fuel use. In fact, if there was a carbon tax on aviation fuel but not on petrol, then people would substitute more flying trips with car trips, which would actually use more fuel per person.

The “constrained extraction and supply” model is definitely the most strategic way to accomplish the mission of lower fossil fuel burning. To a certain extent, this is what will happen at any rate - the conventional oil supply is already declining. But, there are environmentally much more damaging things than conventional oil! In a carbon rush brought on by high prices and 20th Century entitled consumption expectations, the worst-case scenario for the climate will most certainly be achieved. If I was going to spend my time and energy on something - I don’t think I would target flying per-se. I wouldn’t put myself forward, or expect anyone else to pledge not to fly. Rather, I would formulate a very logical and reasonable policy and analysis for setting a moratorium on new fossil fuel extraction, and setting a limit with future reduction on imports of oil, coal and gas. The signal ahead of time of a particular availability of fuel will lead to planning for how to reduce fuel use. This forward planned reduction would be much more fruitful than the destruction of reaction and over-reaction. Who knows, it might be 10,000 people flying to Wellington to rally at the Beehive that causes the enactment of a “constrained extraction and supply” policy that actually starts our civilisation onto a new path of sufficiency and essentiality.

Rimu's picture

An interesting line of

An interesting line of thought, thanks.

Yeah, relative numbers can be deceptive. But they are important. For example, if you looked at the absolute numbers of car trips in China, you might get some scary numbers, compared to the number of car trips in NZ. Should we seek to reduce car usage in China but not NZ? Yet the per capita emissions of an average Chinese person is tiny relative to a citizen in NZ.

Lets choose to always use surface modes

This is an interesting and thoughtful piece. While I agree with most of it, let me offer a different perspective on some of your ideas.

A couple of years ago I decided not to fly again. I think this is a worthwhile personal response to peak oil and climate change, and if more people made this decision we would reduce GHG emissions and make our transport system more resilient. Prior to that, I flew an average of maybe 4 trips per year in my 40-odd years of life; now I travel less often and when I do, those trips are substituted by bus, train and ferry.

For local travel, I mostly cycle, but also bus, ride-share and take the car. I would like our household to be car-free, but other household members want the car, so I travel as a passenger when the car is going my way. For a few medium and longer distance trips if the family is going we will take the car, with usually 4-5 passengers, often 100km journeys to visit family. If I am traveling alone or organising the trip myself, i will go by bus and ferry. Unsurprisingly, since I decided to give up air travel I haven't been overseas, but I have considered freighter travel.

I acknowledge that in some cases, simply swapping air travel for a surface trip will not reduce GHG emissions, particularly if you swap a flight on a full aeroplane for a single occupancy car trip. However, that's not what happens in practice when you decide to fly no more. What happens in practice is that you travel less far and less often, and that more than makes up for the odd occasion when you travel on a lightly loaded bus or car.

So my own decision to forgo air travel has had a small but positive impact, and I belive similar decisions by others would too. But the changes would snowball (ie you'd have a non-linear thing going on) if a significant number of people decided to forgo air travel. The frequency of scheduled air services on particular routes would decrease, and marginal distinations would drop off the network. Air travel would become less convinient, and that would impact trips by every long-distance traveller, with people not travelling or switching modes.

On the positive side, more bus and train trips would be taken, resulting in opportunites for fuller busses, more scheduled services and cheaper services. There are problems with the current services, particularly the infrequency, low loadings, and expense of train travel. So again, an increase in usage will bring network benefits that will advantage all travellers using these modes.

If our aim is to reduce GHG emissions, then certainly effective, practical policy changes to reduce and eliminate nett emissions will be better than a few people deciding not to fly. But this of course is an apples to oranges comparison; while it's completely in my control to decide whether I fly or not, I have unfortunately misplaced my global and national policy dictation powers. Of course we can still change policy; by advocacy, by political action, by persuading our friends. But sometimes that's a hard job, a long-term one set with discouragements and setbacks. It's encouraging to do something personal that is making an immediate difference and helping us move in the right direction.

In fact, I believe it's essential that we tackle these issues on all levels; personal, local, regional and global. So we need to take political actions and weild influence as well as taking personal actions to reduce our own impact, and both are just as important.

So what is the most effective decision we can take on a personal level to reduce our own emissions? For most New Zealanders, eliminating car trips will save more than eliminating flights, sure. And we must tackle both. In the long term both areoplanes and private cars will be as rare as whale oil lamps are today. They will be in museums, and not a part of everyday life. To ease the transition, we'd all do well to start scaling back our use of them now. For many people, they'll be able to phase out air flights more quickly and easily than car use.

If I'm asked what I do about climate change, I find it easier to state "I don't fly" than "I would formulate a very logical and reasonable policy and analysis for setting a moratorium on new fossil fuel extraction, and setting a limit with future reduction on imports of oil, coal and gas," although that's very worthwhile. One thing about the personal steps and stories, is that they can be more effective at getting a message across at a heart level. If I discuss my no-fly life with some people, they may think "wow, that's extreme," it may get them to think about what the implications are for them personally if they were to consider it, they may remember it and change future decisions because of it. If I reply with a political message I'm pushing, I find that more often than not they will assign me to a stereotype they already have in mind and it will not get them thinking.

In fact the personal and political are equally important, but perhaps we need 100 personal anecdotes to each political message?

Work I've been doing lately tells me it's important to ask for what we do want, not what we don't want. So the bottom line for me, although it might be a subtle distinction, rather than asking for a moratorium on extraction or import of fossil fuels, it to ask that every technology, industry and development enhance our planet and it's ability to support human life. I say this not maybe as an easy political catchphrase, but since you are thinking about policy work, this should be an underlying principal in all policy.

Part of that also is to tell people what you _do_ want them to do, not what you don't want them to do.

So what about flying? To Susan and all who read this blog - I do have a request. I'm feeling quite uneasy about the risks we are taking with our planet. I need to continue to get basic sustanence and shelter for the rest of my life, and I have an asthetic need to do that without unduly damaging other people or species, and in a way that will allow my children and decendants to comtinue to live in a wonderful world. So could you please reconsider your transport usage to ensure that it is really enhancing our world. Remember that a train or sea journey has far less of a negative GHG impact on our climate than a flight.

everth's picture

Strategy and Clear Objectives must lead the way

What we are sadly missing from the political leadership of this and most other countries are bold targets and objectives to bring humanity into a sustainable future.

New Zealand, stretched over 1000Km from North to South clearly needs a high speed efficient electric train system for the future. Where is the initiative to plan for and build this? We could have this with a 10 year planning horizon if we really put our foot down.

With a system like this and feeder lines from the outlaying towns to the backbone, flying could indeed be reduced significantly and the power to drive our trains would naturally come from our electricity systems which in principle could be run without fossil fuels.

If we simply reduce the availability of travel by pricing fossil fuels out of the reach of many we make fighting AGW a sacrifice of the poor. Glancing over the superyachts moored in Aucklands Viaduct harbor it is clear that the sacrifices we must make towards a sustainable future will be carried mostly by the poor people unless we tax the rich to pay for the infrastructure we need.

How about a 400% surtax on fist class air travel (in places where 5 others could sit) and a 200% surtax on business class air travel (in places where 2 others could sit) for starters and a 1000% tax on fuel going into private charter jets (the Lear Jets and the Gulf Streams and the Eurocopters....). Make those who presumably have the power to decide and plan for our future based on their position in our oligarchic pseudo democracy feel the pain foremost and first so that we get the momentum to spearhead the changes we need to make.

A world where the 99% of the masses can no longer afford personal travel might sit quite well with those who enjoy their Lear Jet vistas at present...
So lets make sure we do not end up there but that we employ the abilities and the wealth of the rich and the powerful towards making a better world for all of us!

kimgyr's picture

What about energy, food, transportation, jobs, etc. availability

Thank you very much Susan!

These are the kinds of thought that may start us on the path toward sustainability, but it is 100% sustainability that we must all achieve, and very soon at that, if we are to continue to maintain the climate as it is, as well as to have the levels of energy, food, transportation, plastics, pharmaceuticals and cosmetics that we currently consume due to cheap petroleum. Please find the designs that occurred to me as I struggled to relearn all the skills that we learn since birth, how to walk, speak, remember, play tennis, etc. that I lost when my heart stopped for 10 minutes as my forehead was being sutured under a general anesthetic following a car accident in Kenya in 1980. I staggered, walked and jogged more than 330 miles to regain those skills, and imagined how the cars passing me as I jogged might run when there was no more petroleum; the designs can be found at www.greenmillennium.eu
Mr. Kim Gyr
Director, Green Millennium

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I'm not sure about political leadership

Our government is showing strong political leadership in transport infrastructure - they are building new highways, at a time when traffic volumes on our roads have ceased growing. It's not political leadership I would agree with, but it is political leadership. Political leadership is a tough one, I think there is a good case for politicians not to support anything unless it has the support of a large proportion of the population, eg. 75% or more. That would eliminate new motorways and asset sales, and national train systems.

Another good idea to constrain political leadership would be to require policies to be objectively beneficial in the medium term and to be evidence based. Either the government is following an ideological path and ignoring facts, or someone is providing them with false evidence to justify their road building.

I'm not worried about having a gold-plated transport system that allows us to continue to travel the length of the country, why do we need it? I know we're not going to have an extensive air travel network, but in reality it's no great loss. Why don't we just make incremental changes to our existing trains as needed?

I'm also not worried about the lear jet crowd. This is a middle class concern. The poor most probably don't give a toss whether 60% or 0.6% of people fly. I'd rather have 0.6% fly, since the GHG/climate change impact will be much improved. But the middle classes who are set to loose their travel ability may well resent the wealthy.

I'm not going to tell anybody not to fly or tell them they shouldn't. I'm only going to ask them to take care of the earth so I can meet my own needs.

Yes, we need to be clear on our objectives. Reducing income and wealth disparities is a laudable goal and I support it. Reducing GHG emissions and stabilizing our climate is a different goal even if not totally orthogonal.

Aircraft are destined for the museum.....

Susan Krumdieck's picture

If you are going to do something....

I think my main point was too vague.

20% of people actively and vehemently do not want to reduce fossil fuel use and in fact think it will continue to grow.
70% of people care about climate change, and worry about oil supply, but they are too busy or too ambivalent to take any kind of action.
9% of people are concerned enough to take some kind of action, like signing a petition or joining Forrest & Bird or voting Green.
1% of the people are switched on to the point of doing something. If there is to be real change of any kind - it will be the 1% who actually achieve it.

So - if you are one of the 1% who are so committed to addressing these issues that you will take some kind of action, then we all desperately need you to take an action that could cause a change. 1% of people choosing not to fly on the 2-4 times when that was an option, will not be noticed and will not reduce the number of flights or the amount of fuel used. Don't kid yourself that you are part of a movement of non-fliers because there is not a movement of non-fliers.

If 1% of the population signed a petition, funded a media project, gathered in a Rugby stadium, clicked "support" on the Transition Engineering website... And if what they wanted was clear - a moratorium on deep sea drilling and fracking and a freeze and reduction over time of the amount of oil imported into New Zealand.... Then there might be a shift of thought that could lead to change.