OVERVIEW
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BURGESS
Environmental Remediation | ||
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Burgess COMMENTARY Reforestation is positive climate control mechanism. It is important and one of many initiatives that need to be embraced at scale and as quickly as possible. The challenge is that while reforestation has an environmental value it has an economic cost. Meanwhile deforestation for logging, soybeans or cattle ranching has an economic value, albeit an environmental cost. As everyone knows, we number economic value, but we do not number environmental cost with anything like the same rigor. This failure of numbering has to change as fast as possible. A radical improvement in how we do accountancy is a must! http://truevaluemetrics.org Peter Burgess | ||
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Linkedin Dialog
Laurie Lane-Zucker
• 1st
Founder & CEO at Impact Entrepreneur, an Impact Economy Company
1h • Impact Entrepreneur
Let’s start planting! World Economic Forum World Economic Forum 1,979,196 followers 1d Sowing seeds of change. 📕 Read more: https://wef.ch/2YFkm4N #nature #environment Play video Back to start of video Current time 1:16 / Duration 1:20 1 Comment Peter Burgess Founder/CEO at TrueValueMetrics.org developing True Value Impact Accounting 14s Reforestation is positive climate control mechanism. It is important and one of many initiatives that need to be embraced at scale and as quickly as possible. The challenge is that while reforestation has an environmental value it has an economic cost. Meanwhile deforestation for logging, soybeans or cattle ranching has an economic value, albeit an environmental cost. As everyone knows, we number economic value, but we do not number environmental cost with anything like the same rigor. This failure of numbering has to change as fast as possible. A radical improvement in how we do accountancy is a must! http://truevaluemetrics.org ------------------------------------------------------ Massive reforestation is key to averting a climate catastrophe 
A view of the Garcia River Forest near Longvale, California July 27, 2009. The trees which trap quantities of the carbon dioxide that is warming the planet are sold as living carbon traps or 'sinks' rather than cut for timber, a model that could go global. But the prospect of a worldwide market could also attract hustlers eager to make a quick buck without making a difference to the planet. Photo taken July 27, 2009. Restoring the world’s forests on an unprecedented scale is “the best climate change solution available”, according to a new study. The researchers claim that covering 900m hectares of land – roughly the size of the continental US – with trees could store up to 205 billion tonnes of carbon, about two thirds of the carbon that humans have already put into the atmosphere. While the best solution to climate change remains leaving fossil fuels in the ground, we will still need to suck carbon dioxide (CO₂) out of the atmosphere this century if we are to keep global warming below 1.5˚C. So the idea of reforesting much of the world isn’t as far-fetched as it sounds. Since the dawn of agriculture, humans have cut down three trillion trees – about half the trees on Earth. Already 43 countries have pledged to restore 292m hectares of degraded land to forest worldwide. That’s an area ten times the size of the UK. But what the new study advocates is reforesting something like ten times that amount. 
Trees absorb CO₂ from the air and store the carbon as bark and other tissue.Image: Mark Maslin, Author provided Rewilding habitats and reforesting may be easier in the future as the world is already becoming a wilder place in many areas. This may seem a strange prediction, given that the global population will grow from 7.7 billion to 10 billion by 2050, but by then nearly 70% of us will live in cities and have abandoned rural areas, making them ripe for restoration. In Europe already, 2.2m hectares of forest regrew per year between 2000-2015, and forest cover in Spain has increased from 8% of the country’s territory in 1900 to 25% today. Massive reforestation isn’t a pipe dream and it can have real benefits for people. In the late 1990s, environmental deterioration in China became critical, with vast areas resembling the Dust Bowl of the American Midwest in the 1930s. Six bold programmes were introduced, targeting over 100m hectares of land for reforestation. Grain for Green is the largest and best known of these. It reduced soil erosion and stabilised local rainfall patterns. The ongoing programme has also helped to alleviate poverty by making payments directly to farmers who set aside their land for reforestation. Better yet, the new study suggests that bringing back 900m hectares of forest wouldn’t impact on our capacity to reserve land for growing food. This is certainly possible, and in line with other estimates. Reforestation may even result in production from farmland increasing, as was found in China when more stable rainfall and fertile soil followed the return of forests. 
Where the billion hectares of forest could be planted – excluding desert, farmland and urban areas.Image: Crowther Lab, Author provided 
How all of that new forest would look, alongside what’s already there.Image: Crowther Lab, Author provided No solution without emission cuts There should be more scepticism about how much CO₂ 900m hectares of new forest could store though. The paper insists on 205 billion tonnes of carbon, but this seems too high when compared to previous studies or climate models. The authors have forgotten the carbon that’s already stored in the vegetation and soil of degraded land that their new forests would replace. The amount of carbon that reforestation could lock up is the difference between the two. Mature forests can store a lot of carbon, but this capacity is only reached after hundreds of years, not a couple of decades of new forest growth as assumed in this study. The most recent estimate from the IPCC suggests that new forests could store on average an extra 57 billion tonnes of carbon by the end of the century. This is still a huge number and could absorb about one sixth of the carbon that’s already in the atmosphere, but reforestation should be thought of as one solution to climate change among many. 
Radically reducing carbon emissions and absorbing the carbon that’s already in the atmosphere will be necessary to avert catastrophic climate change.Image: Mark Maslin, Author provided Even if warming is stabilised at 1.5˚C, the study indicates that one fifth of the land proposed for reforestation could be rendered too hot for growing new forests by 2050. But this concern ignores the role of carbon dioxide fertilisation – when there are higher levels of carbon dioxide in the atmosphere, photosynthesis is more efficient, meaning plants need less water and can still be productive at higher temperatures. Today, the most immediate threat to tropical forests is deforestation by people and the fires they light which get out of control, not the more subtle impacts of higher temperatures. Reforesting an area the size of the US will have massive benefits on local environments and will store a huge amount of man-made carbon emissions. It is not, however, a substitute for reducing those carbon emissions. 
Tree planting schemes in Mexico have helped the country restore 63,000 hectares of forest since 2009.Image: EPA/Jose Mendez Even if the world reduces its carbon emissions to zero by 2050, there will still need to be negative global carbon emissions for the rest of the century – drawing CO₂ out of the atmosphere to stabilise global warming at 1.5˚C. Reforestation is essential for creating negative emissions – not reducing the amount of carbon that humans are still emitting. There is another sting in the tail. Massive reforestation only works if the world’s current forest cover is maintained and increasing. Deforestation of the Amazon rainforest – the world’s largest – has increased since Brazil’s new far-right president, Jair Bolsonaro, came to power. Current estimates suggest areas of rainforest the size of a football pitch are being cleared every single minute. It won’t be easy, but society needs to protect the forests we’ve got, and protect new forests in perpetuity to permanently keep carbon sequestered in trees and out of the atmosphere. ------------------------------------------------------------ Written by Mark Maslin, Professor of Earth System Science, UCL Simon Lewis, Professor of Global Change Science, University of Leeds and UCL This article is published in collaboration with The Conversation. The views expressed in this article are those of the author alone and not the World Economic Forum. How do we build a #sustainable world? Submit a video Most Popular These 11 sinking cities could disappear by 2100 Talia Lakritz · Business Insider 10 Sep 2019 Record-breaking heatwaves killed about 1,500 people in France Rosamond Hutt 12 Sep 2019 These are the world's five most-visited cities Sean Fleming 12 Sep 2019 More on the agenda Explore context Environment and Natural Resource Security To match feature USA-CLIMATE/TRADING REUTERS/Peter Henderson (UNITED STATES ENVIRONMENT BUSINESS) - GM1E58L0LFY01 Trees are a highly effective carbon sink.Image: REUTERS/Peter Henderson Explore the latest strategic trends, research and analysis Have you read? 5 reasons to protect mangrove forests for the future Why saving our forests should be a global priority Rare earths are the new battlefront in the US-China trade war. But what are they?
This article is published in collaboration with The Conversation
... Mark Maslin Professor of Earth System Science, UCL
... Simon Lewis Professor of Global Change Science, University of Leeds and UCL
| 08 Jul 2019 The text being discussed is available at | https://wef.ch/2YFkm4N and |