Climate change was the global health emergency before a virus stole the show. As callous as that and the following may read, it’s difficult to unsee the disparity in response to Covid-19 as a public health threat compared to the health effects of climate change. Yes—at the time of this writing Covid-19 has killed over 121,000 people worldwide, and I’m not arguing the clear risk to public health as this disease continues to spread. But this pandemic, a respiratory illness, is occurring on a planet where the World Health Organization estimates about 7 million people die each year as a result of air pollution.
The impotence displayed by those who would continue to dirty the air with business as usual can no longer hold the economy hostage and threaten its destruction—a few fragments of RNA and some protein strands have taken care of that for them. And besides, how many times can the same dollar be passed around before it disappears anyway? It appears Alberta will be finding out. Using all the money its current government has saved by not paying the province’s healthcare workers, it will instead be investing over 1 billion dollars (that’s $1,000,000,000 or 1 gigadollar) in the incomplete Keystone XL pipeline, a project designed to carry oil now too expensive to get out of the ground because it’s worthless once it is.
Just as it wouldn’t be possible to burn yesterday’s wood to power today, it won’t be possible to burn today’s oil to power tomorrow. There’s no oil in the future. The party is over. The houselights are coming up, and they’re being powered by clean energy. An electric taxi waits silently outside. It’s time to go home.
If you’re here looking for the next hot stock tip, take whatever might still exist of your money out of oil and invest it in trees. While trees may not be capable of powering tomorrow in the traditional sense, they will be instrumental in saving it.
Carbon is the 6th element on the periodic table, the 4th most abundant element in the visible universe, and makes up approximately 18% of the mass of the average human body. In fact, carbon is present within the cells of every single currently understood form of life on this planet. So when massive amounts of sea creatures and algae are compressed by rock under tremendous amounts of time and pressure to create petroleum, all the carbon from all the sea creatures and algae ends up in the petroleum as well. Burning any fuel refined from petroleum will release the carbon either as a component of soot—a known carcinogenic—or as carbon dioxide—a known greenhouse gas.
Various technologies have already been developed to reduce soot emissions, so when people talk about carbon emissions, at least in Canada, what they’re usually referring to is the amount of carbon dioxide, the amount of CO2, that ends up in the atmosphere. And when these same people talk about carbon capture, or carbon offest, what they’re referring to are ways to take CO2 out of the atmosphere.
The substance of a tree is carbon, and where did that come from? That comes from the air; it’s carbon dioxide from the air. People look at trees and they think it comes out of the ground …the trees come out of the air.
—Richard Feynman
During the day, trees use the energy contained in sunlight to convert water from the ground and carbon dioxide from the air into sugar. During the night, trees use the energy contained in sugar for nourishment and growth. The chemistry involved in these processes produces a surplus of oxygen. Without any need for it, this oxygen is released back into the atmosphere by each tree. Referred to as the lungs of the planet, trees breathe in carbon dioxide and breathe out oxygen, and in light of increased global CO2 emissions, the planting of new trees is seen as one way to offset those emissions. The idea is, for situations where—for whatever reason—it’s impossible to not release carbon dioxide into the atmosphere, newly planted tress will convert an equivalent amount of CO2 already in the atmosphere into the growth of new forests. The carbon emission equation balances out, and the result is a coveted net–zero or carbon neutral sticker on whatever product or procedure is seeking acceptance as being beneficial for the environment.
While a good idea in theory, there’s one immediate practical problem with the idea of offsetting carbon emissions: there’s already too much carbon dioxide in the atmosphere. While not adding any more CO2 is certainly a step in the correct direction, it’s dangerous to assume not making things worse is any sort of long term solution. Things are worse as they are. If you’re already carrying too much stuff, finding out you won’t be asked to carry any more stuff only delays exhaustion’s inevitable arrival.
Right now—despite the illusions of comparatively advanced technology—the fundamental method used to generate large amounts of power hasn’t changed much in the last few hundred to few thousand years: make things hot by burning other things. This method, despite its inherent inefficiencies, produced relatively inconsequential emissions of carbon dioxide for thousands of years. But in less than 200 years, as more and more power has been generated using this inefficient method, global CO2 emissions have grown exponentially. Emissions in 1850 were estimated at about 200 million tonnes. By 2017 emissions had grown to about 38 billion tonnes—an increase of over 18,000%.
By the way—are you curious about what a tonne of an invisible gas looks like? I was. So were the creators of the following video. They used an American unit of measure—the metric ton—for their demonstration, but there’s no conversion needed. A metric ton is the same as a tonne: both are 1000 kg.
The estimated amount of carbon dioxide one tree is able to capture from the atmosphere is about 0.58 tonnes …over 80 years. Yup—the process takes time, though this shouldn’t come as a surprise to those who understand how a forest works.
To capture the amount of carbon released in 2017 would require a forest of 65 billion trees. There are an estimated 3 trillion trees (that’s 3,000,000,000,000 or 3 teratrees) on the planet right now. But—those trillions of trees have only now just finished capturing the carbon dioxide released in 1940. And in each year since 1940, more carbon dioxide has been released into the atmosphere than the year before it, which means more and more trees needed for carbon capture. But more and more trees have been cut down since 1940, cancelling out any future carbon capture capacity they provided. Additionally, some of these felled trees would have been burned for fuel, meaning all the carbon captured over the years the tree was alive would have been released back into the atmosphere. The 3 trillion trees today are what remain of an estimated 6 trillion thought to have existed before the advent of human civilization. And despite increased reforestation efforts, about 10–15 billion more trees are removed each year than are planted.
As an individual who uses electricity, drives a car, and is alive, I contribute to the emission of carbon dioxide into the atmosphere. My CO2 emissions will rank somewhere between someone who lives on the land and uses a fire for survival and someone who lives in a sprawling chalet mansion and uses a private jet for survival. Based on my utility bill I use an average of 5.7 kW/h worth of electricity per day, so for the year, as a resident of Ontario, I am responsible for about 0.23 tonnes of CO2 each year so I can make my coffee, charge my electronics, watch my TV, and run my computers. However, if I lived in Alberta, that same 5.7 kW/h worth of electricity per day results in about 2.08 tonnes of CO2 per year, about 9 times more.
Almost all the electricity in Alberta is generated by burning coal and natural gas. The province has the honour of operating the largest fleet of coal–fired power plants in Canada. Only about 8% of Alberta’s power comes from other sources. By comparison, about 60% of Ontario’s electricity is generated by using nuclear power. Only about 7% comes from burning natural gas. There are no longer any coal–fired power plants in the province, and the rest of Ontario’s power comes from hydroelectric dams, wind farms, and solar panels.
When making the comparison above, it must be noted the average of 5.7 kW/h of electricity per day is based on my usage. I use energy efficient lighting in an efficient way. I have configured my electronics to shutdown and save power whenever possible. I don’t have a large sized refrigerator or oven. I also don’t have a washer or dryer. But most importantly, my building uses a natural gas boiler to produce heat and hot water for my apartment. I have no idea how much gas the boiler uses to service my needs—so I’ll estimate it’s around half the average amount of natural gas burned for a home in Ontario. That works out to about 2.2 tonnes of CO2.
It also must be noted the disparity in emissions between the two provinces exists only in the world of generating electricity. When it comes to home heating and hot water, things are not as clear cut when it comes to reducing emissions. If I was living in Ontario and wanted to reduce my carbon emissions above all else, I might consider replacing my natural gas burning appliances with electrically powered equivalents. But—ignoring all other considerations for the sake of this example—swapping something out that burns natural gas for something that uses electricity instead will only save on carbon emissions if the method of generating electricity isn’t producing any carbon emissions either. Ontario’s electrical grid is mostly carbon–free. But if this example were to play out in Alberta, I’d be taking the emissions being made at my house and sweeping them under the rug somewhere else—into Saskatchewan I guess.
So far my carbon budget includes a reasonable estimate based the electricity I use to power the things in my life and a somewhat less precise estimate on the heat and hot water used by my apartment. At 2.42 tonnes per year I’ll round up and say I need 5 trees per year for carbon offset. Now it’s time to budget for my car. Using the average CO2 emissions for a gasoline powered compact car such as mine and a yearly average of 30,000 km (I drive a lot, or at least, I used to…) adds another 5.5 tonnes.
Yes—driving adds over 200% to my carbon budget.
Now I need about 14 tress to offset my yearly emissions of about 7.92 tonnes per year, and I’m not done yet. I haven’t bought anything to eat. I haven’t taken my car in for maintenance. I haven’t done anything for recreation. I haven’t even fed my cat. All these activities have an associated emission of carbon dioxide, and those emissions haven’t been factored in.
All–in the average Canadian emits 20.3 tonnes of CO2 per year. At 35 tress per person and 37.6 million people in Canada that’s about 1.1 billion tress needed to offset one year of the population’s carbon dioxide emissions. But—and I cannot stress this enough—that one year’s worth of carbon emissions is offset over 80 years.
Canada’s Liberal government recently campaigned on a promise to plant 2 billion tress if elected. They were elected, so the next step is for those trees to actually get planted. Two billion sounds like a large number of tress, likely because most people are used to either experiencing trees in small and relativity countable numbers or as scrolling landscapes of seemingly uncountable forest. But do 2 billion tress still sound like a lot when it’s unlikely they’d be able to capture just 2 years worth of the carbon dioxide emitted by the country planting them? How about if I told you those 2 billion trees will be planted over the next 10 years? That’s the plan when you read the fine print.
When I think back to the amount of carbon dioxide I produce, when I think back to what’s in my carbon budget, there’s one glaring line item: the car. Its estimated 5.5 tonnes of CO2 represent nearly 25% of the emissions I might make as an average Canadian. At the moment I’m not driving it unless absolutely necessary, perhaps only a few hundred kilometres per month.
If Canada could decrease the country’s average emissions per person by 25% the number of tress needed per person goes from 35 to 26. Now those 2 billion trees can offset just over two years of carbon dioxide—and I do mean just: it’s 2 years and 2 weeks plus 3 days.
So what would happen if the government double doubled down on its commitment and planted trees as if our lives depended on it—4 billion trees in just 5 years? Well, predictably, doubling the number of trees will double the amount of carbon able to be offset, but it’s still going to take 80 years in total, give or take 5 years. It’s a linear relationship, and this is why reducing CO2 emissions now is critical. The rate of CO2 emission tends to grow exponentially, but the mitigation effect of carbon offsetting doesn’t.
Think of rampant CO2 emissions as a pandemic spreading across the countries of the world. Every few days the emissions double, and then double again a few days later. The infection is growing exponentially. Now think of each country’s healthcare system as a forest, each forest a product of the care and support (or lack thereof) afforded by each country, each tree a healthcare worker. The system becomes overwhelmed almost immediately as it is unable to match the exponential growth of the infection it is treating. The only way to grow the capacity of the healthcare system is to add more healthcare workers, but training them takes time, and in that time, other healthcare workers become overworked—they become tired. Some become infected themselves. Now there are even less healthcare workers to treat yet more infection. Slowing the spread of the pandemic, reducing the amount of infection, is the most immediately impactful way to protect the current capacity of the healthcare system. Compassionate, deliberate, and meaningful investment in the healthcare system, in the contagion capturing forest of healthcare workers, is the most impactful way to protect and grow its future capacity.
One of the many things my sister is working on is a project to plant 1000 trees. In learning how to support her initiative, I came across the piece of information which inspired this post—how the average rural tree in Canada captures about 0.58 tonnes of CO2 from the atmosphere over 80 years. The 1000 trees she plants will capture about 580 tonnes of CO2, enough to offset about 28 average Canadian’s emissions for one year at today’s rates. And if every one of Canada’s 37.6 million inhabitants where able plant 1000 trees in the next 5 to 10 years, the resulting 37.6 billion tree forest would be able to capture Canada’s current yearly emissions for the next 34 years. Or, if these emissions were to be reduced by 25%, for the next 45 years.
But what if Canada looked beyond its own borders and inhabitants? What sort of forest might the world’s population plant? An average of 9 trees planted by every one of the world’s 7.53 billion human inhabitants produces about 65 billion trees—which happens to be the amount of trees needed to offset the CO2 emissions from 2017.
I’ve had to update the total number of people killed by Covid-19 several times since I decided to include the information at the start of this post. Back at the beginning of April the count was just over 50,000. It’s since more than doubled, and now the virus is present in all but a handful of the most isolated countries on the planet. The numbers of infections and deaths vary from country to country, as does the effort (or lack thereof) to contain the spread of infection. The media tend to focus on the status of individual countries, but this perspective diminishes the need for global cooperation and coordination. The healthcare workers of the world are putting in nothing but overtime during this pandemic. They’re operating at or beyond capacity, so they need everyone’s help in slowing the spread of the infection.
With day to day life placed on indefinite hold for an estimated third of the world’s population, emissions of carbon dioxide have dropped significantly. Covid-19 has provided a unique opportunity to study the immediate effects of CO2 reductions outside of theoretical models, perhaps the only sliver lining in an otherwise dark and deadly storm. The smog–choked skies of some cities are clearing to reveal what some residents have never seen before—distant mountains lost for decades behind unending air pollution. How strange it would be to rob these people of such a sight after telling them to remain indoors for months.
When the threat of one pandemic has passed, the threat of another will be waiting in newly freshened air. The comfortable and complacent choice of believing this is the only way will belong to another era. What will remain in its place will be the temptation to resume something known, yet also something known to be destructive.
But why embrace destruction as the first contact we have with each other after being apart for so long? Why not work together to create something new instead, something as yet unknown, but by definition, something where the sky’s the limit, and begins with clear views of forested mountains.
Please visit treecanada.ca if you’d like more information on how you can help trees capture carbon. There’s also a carbon calculator you can use to see where your carbon emissions are occurring and where there are opportunities for reduction.
Please also consider supporting Tree Canada through a direct donation or paying for one or more saplings to be planted in areas across the country. Municipalities within Ontario and beyond may also offer free tree planting programs to qualified property owners. Check and see if the one you live in does, and if they don’t, and you feel up to it, consider asking yours why not.
And finally, if nothing else, please find ways to support and encourage those around you who are working hard to make the world a greener and healthier place. Every unnecessary car trip not taken, every extra electric light turned off, and every sneeze caught in an elbow counts.









