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How Canadians can unpack planeloads of emissions

The cost of slipping up to the sky in a jet is environmentally toxic, writes Ralph Martin. Its climate impact per passenger hour is six to 47 times higher than that of cars. Photo by Anete Lūsiņa / Unsplash

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As a teenaged farm boy from Wallenstein, Ont., my first jet flight was an expansive experience. Suspended above Earth, my mind and spirit wandered and wondered unfettered by time and space as we drifted across landscapes. This vantage point was a big hop from a tractor seat.

However, unknown to me then, the cost of slipping up to the sky in a jet is environmentally toxic. Its climate impact per passenger hour is six to 47 times higher than that of cars.

Given associated greenhouse gas (GHG) emissions, non-carbon emissions and other climate-forcing impacts, passenger air travel accounts for at least 3.5 per cent of global warming, more than the three per cent of global emissions for the whole continent of Africa. In Canada, the expense of burning jet fuel is our second-biggest transportation cost.

As you might guess, flights are not distributed evenly across the population. In fact, “frequent flyers representing just one per cent of the world’s population caused half of aviation’s carbon emissions in 2018.” Furthermore, in 2018, only 11 per cent of the globe’s 7.9 billion people travelled by air. It’s worth sitting back on our haunches, preferably on the ground, to reflect on who benefits from all the subsidies to airline companies to keep such a small proportion of entitled folks looking down.

In 2019, there were 163 million air passengers in Canada, or roughly 4.2 flights per passenger in Canada — a pre-COVID peak. To redress the climate impact of flights, most taken by a small percentage of the population, we could cap the flight allowances in Canadian airspace. Let’s agree that each Canadian is allowed four flight allowances per year (i.e., the right to then purchase tickets for four flights).

Opinion: Over the Christmas holidays 15 years ago, I was challenged by George Monbiot’s book, Heat and its analysis of the climate impact of flying, writes @ralphmartinOAC. #GHGs #Emissions #AirTravel

Transport Canada could develop a flight allowance market, and flight allowances per person could be sold by Canadians who opt not to travel to anyone (Canadian or international citizen) who chooses to fly in Canada. Since planes cruising at high altitudes are relatively efficient, the emphasis is on the number of flights or the number of times each plane must take off.

It is economically realistic that those who fly the most, pay their portion of the tab, whether personally or as an employee benefit. Some Canadians might choose to keep two flight allowances and sell two, understanding they have until the end of the year to sell their allowances.

Buyers could bid electronically, with the transaction facilitated and recorded by Transport Canada. The market price for each flight allowance calculated from aggregated bids and offers to sell should be transparent to all buyers and sellers. To be fair, opportunities for low-income Canadians, who may not have access to electronic transactions, should be available for them to sell flight allowances at current rates in post offices or other public institutions.

In the future, flight allowances might be for a period of 385 days, rather than 365 days, as in the initial offering. The period for each offering could be extended as required to meet GHG emission targets. That means anyone wanting to fly in Canada within that period would need to buy a flight allowance from those allocated for that time frame. With a combination of timing and a whole number of total flight allowances per Canadian, Transport Canada could wind down passenger flight GHG emissions.

Airline companies make the case that they are ramping up the use of sustainable aviation fuels (SAF). The holy grail for SAF is green ammonia, produced from water and air using renewable energy. So far, SAF use is more aspirational than actual, but to drive innovation, a flight allowance market could have provisions to adjust with less stringent requirements, calibrated to specific implementations of SAF with measured reduced GHG emission impacts.

Over the Christmas holidays 15 years ago, I was challenged by George Monbiot’s book, Heat and its analysis of the climate impact of flying. Even though I was the director of a national organization, I told my board in January 2007 that I had decided to stop flying, except for compelling family obligations. Since then, I’ve twice taken trips by air.

I understand the arguments about the apparent futility of small individual actions and how I have no right to be smug about my decision. Believe me, I’d prefer not to discuss it with anyone. My intention is to show that it is quite possible to stop — or significantly reduce — flying. I have not suffered by travelling in different ways. Maybe roots in a Mennonite community predispose me to accepting that some activities can be precluded.

Beyond individual action, Canadians could accept a system that will tangibly assign financial costs to the increasing environmental impacts of flying so that those who choose to fly pay the bill.

Ralph C. Martin, Ph.D., professor (retired), University of Guelph. Information on his book, Food Security: From Excess to Enough at www.ralphmartin.ca

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