Overshoot is a Scam
Overshoot is scam: The concept of overshoong our climate targets and then aempng to reverse
the damage that that transgression has caused is a dangerous gamble. Because, the consequences of
exceeding 1.5°C, 2°C, or even 2.5°C of warming will be irreversible and catastrophic. Under those
temperatures, our landscapes will be transformed, extreme weather events will become more
frequent and intense, and ecosystems will collapse. Not to menon, sea levels will rise, displacing
millions.
The core of the overshoot ideology is decidedly roen. Because faith in the success of overshoot
means a belief in the power of carbon capture. Whether through bioenergy carbon capture and
storage or through direct air capture, the champions of overshoot and indeed the majority of climate
acon pathways claim that we need a mass scale-up of carbon removal technologies. The problem is
that these technologies are untested and unproven at a mass scale. Bioenergy carbon capture and
storage, for example, would require land 1 to 2 mes the size of India, as it relies on growing carbon-
removing crops to burn and use for fuel, and as of 2023, there are only 6 plants in operaon.
Meanwhile, directly capturing carbon out of the air is essenally a pipedream. While there are a few
operaonal plants, they are just that, few. The current, very opmisc rollout of direct carbon capture
by 2030, which includes all projects sll in the concept stage, sll falls short of the 2050 net zero
energy goal according to the Internaonal Energy Agency. What’s even more concerning is that these
technologies currently represent less than 0.1% of all carbon removed from the atmosphere. If we’re
already struggling to scale up renewables at a rapid pace, why on earth should we expect to do so
with carbon removal? And we would need a massive scale-up of carbon capture technology. This
paper esmates that up to 400 gigatonnes of carbon dioxide would need to be removed from the
atmosphere by 2100 to limit warming to 1.5 °C… “In emissions terms, that is equivalent to running the
US energy industry in reverse for around 80 years.” Not to menon, these carbon removal
technologies should be focused on eliminang and quickly abang any lingering sectors that we’re sll
trying to decarbonize– not occupied with the emissions of business as usual and comparably easy
sectors to switch to zero carbon. Essenally, overshoot leans heavily on the fabricaon of carbon
capture. It claims that we can emit all we want now because someday down the road we’ll have
carbon removal at a scale that can turn back the clock on the climate. But those promised
technologies are unproven and untested at the scale many overshoot pathways demand.
But even if carbon capture technologies did work at the scale we need them to, shoong past 1.5C of
warming will cause innumerable climate catastrophes while we wait for mass carbon capture
deployment. Once we breach 1.5C of warming and head towards 2C, we increase the likelihood of
four irreversible pping points. As Malm explains in an interview with BreakDown there's a cluster of
these pping points between 1.5 and 2 degrees that's when the melng of the Greenland ice sheet
becomes irreversible which means 7 MERS of sea level rise same with the West Antarcc ice sheet
same with the potenal collapse of the Amazon into a Savannah and the melng of the permafrost’].
So, overshoong 1.5C would mean the permanent death of coral reefs, the Amazon turning into
savannah, the complete meltdown of the Greenland, and West Antarcc Ice sheet, and the melng of
boreal permafrost, all of which are irreversible. Put another way, no amount of carbon capture will be
able to reconstruct coral reefs or the ice sheets. Again Malm argues [“the true extremism here is not