Carbon offsets do not work


Carbon offsets sum up all that is wrong with our approach to tourism and climate change. They perpetuate the idea that climate change does not prevent unlimited growth with old and highly polluting technology; shifts the moral responsibility for carbon reduction to someone else (not the type of behaviour we need to encourage); and finally there is the small matter that they don't work.

The concept of carbon offsets has existed for many years. They occur in two separate contexts, the compliance market and the voluntary offset market. Airline passengers may well be familiar with these, as airlines frequently offer them to customers as a way to compensate for the CO2 emissions from their flights. By voluntarily paying a little extra, based on how much CO2 their flight will generate, a passenger (or businesses) can support an initiative which ‘cancels out’ this CO2 – such as tree planting, a wind farm or the distribution of fuel efficient stoves in developing countries, for example.

However, there are deep set problems with offsetting schemes. Here are some of the issues with offsetting:

  1. Top schemes have not worked: A 2017 study of offsets, commissioned by the European Commission, found that 85 percent of offset projects under the Kyoto Protocol’s Clean Development Mechanism (CDM) had failed to reduce emissions. This clearly shows that even the very best schemes don’t work.

  2. Offsets cannot act quickly enough; only reductions can: Given the huge growth in aviation in recent years, the continued growth predicted in future, and the limited time period available for reversing climate change, many campaigners and climate scientists believe that the focus should be on reducing the number of flights, not paying for CO2 savings elsewhere which could take years to take effect and have little guarantee of working. In the case of forest planting for example, trees do not reach their average carbon storage capacity until they are between 15 and 35 years old – far too long given the urgency of the climate catastrophe we are faced with. We do not have the luxury of time if we are to keep global warming below 1.5C. Carbon offsets can therefore never radically reduce emissions at the speed required.

  3. Offsets distract from the real issue of necessary reductions: Offsets can deter consumers from reducing the number of flights they take, as they claim to provide a ‘guilt-free’ way to travel. Friends of the Earth have previously referred to them as a ‘dangerous distraction’. For these reasons Responsible Travel stopped offering offsets to our customers in 2009, as we simply didn’t believe they achieved their aim.

  4. Offsets shift our moral responsibility to reduce, to someone else: The concept of paying other people, in another corner of the world, to cut your emissions instead of cutting your own is fundamentally flawed. As Keith Allott at WWF-UK has said, ‘the problem with carbon offsetting is that at best it robs Peter to pay Paul – with no net benefit for the planet.’

  5. Offset programmes may have happened regardless: In theory, offset schemes must ensure that additional trees are planted, or more stoves are distributed, than would have happened without the scheme. This is known as ‘additionality,’ and it is frustratingly hard to prove. If the wind turbine is going to be built regardless, the offset contributed no extra benefit, and no carbon has been offset.



  6. Difficulty in measuring offsets’ contributions: In the case of forest carbon offsetting for example, it is very difficult to calculate the amount of CO2 that is stored in a forest (the only truly accurate way involves cutting it down and burning it).

  7. Carbon storage in trees is temporary: Many carbon calculations assume newly planted trees will be there for a century; this is wildly optimistic. As well as fire, disease, storms and natural decay, there is a huge issue with the number of trees that are harvested illegally. For example Austrian Airlines AG, EasyJet Plc and Virgin Atlantic Airways Ltd have paid to have forests planted only to see that they have later been cut down. Furthermore, it may be the case that by paying to protect a piece of forest from logging for example, you successfully protected that particular area. However, the logging company may have then subsequently bought a similar plot of forest nearby to chop down instead. This is known as ‘carbon leakage’.

  8. Offsets impact on indigenous communities: Often communities have very little say in the schemes, despite the fact that their livelihoods are often affected as a result. Schemes which prevent logging in tropical forests have been accused of harming the traditional ways of life of indigenous people; forest communities are effectively paying the price for our cheap flights.

  9. No incentive or funding for decarbonised air travel: Offsets also represent a barrier to the aviation sector moving towards zero carbon technologies. They provide a quick fix and delay the need for urgent innovation and investment by allowing the continued use of emissions-intensive fuels. We need far-reaching technology and innovation changes to achieve reductions at scale and to meet the long term aim of decarbonisation.

  10. Take up rates: Take up rates among consumers for voluntary offset schemes are historically low, at around 1 percent.

Aeroplane chemtrail
Photo credit: Gralo
Initiatives such as the Carbon Offsetting and Reduction Scheme for International Aviation (CORSIA) function on a global scale, and – from 2027 – a mandatory one. At the end of each three-year phase of the scheme, airlines will need to buy credits to offset their CO2 emissions for those years.

The big debate concerns which climate initiatives to allow as offsets. Of course, creating a market for offsets incentivises countries to develop their own green initiatives, so that they can sell offsets. However, given that many of these initiatives would have gone ahead anyway, there are concerns about additionality – buying offsets from these schemes creates no additional reduction in emissions. These have been called ‘junk credits’, and many environmental campaign organisations have called for these to be excluded from the Paris Agreement and other climate targets, saying that they threaten our ability to really reduce global carbon emissions.

There are, of course, some excellent emissions reduction projects being set up. But counting these as offsets is not necessarily the best – or most honest – way of going about this. Counting an offset as an offset when it is not actually compensating for carbon emissions is only going to make climate change worse.

Written by Vicki Brown
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