Out of the woods, pt 1

I have been getting into the woods a lot lately. Last year I started including trail running as part of my habit, and tackled my first big trail race, the 30km Coastal Classic, in September. It's an event that runs through the second oldest National Park in the world, the Royal National Park, although the beautiful old single track is being built out in most sections by fibreglass decking.

This isn't a completely new thing for me; I used to train for school cross country races by running around the farm paddocks and residual bushland of Jamberoo valley. I've even been running along the Mt Keira ring track, which we hiked around on Scout camps back in the nineties!

There's something about getting out into the woodlands and bush that makes trail running a different kind of experience. The natural world doesn't grow in the straight lines and even surfaces of our built environments; you must focus on each step, be aware of each tree and root and rock as you come across them. And the air just seems cleaner. Even during our summer of bushfire catastrophe, when the whole east coast of Australia was suffocating under smoke, getting out into the bush ringing the Illawarra provided some relief from the sense of doom. Every morning I woke up and surveyed the forested escarpment with trepidation, looking for a smoke plume that meant fire in our area, but I still felt like I could breathe easiest out amongst the peaceful gums.

That last part is why forests are a huge part of climate change - the ways plants breathe, drawing in carbon dioxide and releasing oxygen, is one of the key components of the carbon emissions equation. As it says in Drawdown: The Most Comprehensive Plan Ever Proposed To Reverse Global Warming, "no other mechanism known to humankind is as effective in addressing global warming as capturing carbon dioxide from the air through photosynthesis."

Increased carbon dioxide in the atmosphere has actually allowed plant productivity to increase, and the amount of carbon being drawn down by plants each year has gone up since 1960. As plants grow, they store carbon in their wood, and it is only released back into the atmosphere when it burns or rots:

Australian forests and wood products store or sequester approximately 57 million tonnes of carbon dioxide which offsets around 10% of the total greenhouse gases emitted in Australia. This takes into consideration a loss of carbon from forests each year of approximately 4.4 million tonnes due to prescribed burning, wildfires and wood harvested for energy. Carbon constitutes approximately 50% the dry mass of trees and when wood from these trees is used to produce wood products the carbon is stored for life in that product. For framing in our homes this carbon storage is life is around 100 years, around 30 years in furniture, 30 years in railroad ties and around 6 years in pallets and paper. Carbon stored in wood is only released back to the atmosphere when the wood product is burnt or decays.

At present, forests in Australia offset around 10% of our annual emissions (although keep in mind, carbon dioxide isn't the only greenhouse gas contributing to climate change).

Afforestation - the planting of trees in areas which have been treeless for at least fifty years - could soak up a lot of the excess carbon dioxide in the atmosphere. A study published in Science journal last year identified that "there is room for an extra 0.9 billion hectares of canopy cover, which could store 205 gigatonnes of carbon in areas that would naturally support woodlands and forests. This highlights global tree restoration as one of the most effective carbon drawdown solutions to date." It can be done cheaply, simply and within the timeframes that are projected to keep warming below 1.5c.

Good news about climate change - reforestation and afforestation can draw down a good chunk of all of humanity's historic greenhouse gas emissions and help undo the damage of anthropogenic climate change.

However, as the study identifies, that is not the trajectory we are on. We aren't getting into the woods: we are running out of them.

 

The World Wildlife Fund has identified the eastern coast of Australia as a global deforestation front - the only one in the developed world. The biggest part of the front has been in Queensland, where farmers have been given a free rein to clear land over the last decade. The amount of woodland Queensland cleared in 2015-16 alone was 395,000 hectares. The graphic comparison in this Guardian article, when centred on Mt Keira, stretches all the way from the start of the Royal National Park in the north, out to the bushfire-ravaged suburbs of Bargo and Yanderra, and south past Saddleback Mountain. Queensland's annual deforestation of native vegetation is an area bigger than the entire Illawarra region.

The world isn't afforesting or reforesting - it's deforesting. There is some dispute over how fast it is happening, and how much land that humans clear regenerates, but across the world, forests are disappearing. The Amazon, also the scene of a wildfire crisis in 2019, is being deforested at an accelerating rate.

Once again, there are market-based solutions in place to address the issue. Carbon credit schemes protect forests in the developing world by paying for trees not to be cut down and carbon to be stored, but, as with all market-based solutions, they simply pass the parcel on to another landowner or industry, offsetting the dirty work of pollution or deforestation that they do, rather than stopping it happening at all. And a carbon credit cannot prevent bushfires destroying the trees and releasing the carbon contained within them anyway. 

We are still going the wrong way.

We are running out of the woods. 

In part two, I go into what last summer's bushfires mean for carbon emissions, deforestation and climate change calculations.