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What drives the value of BECCS in IAMs?
* High discount rates
* Missing technologies (eg, other CDR options, behavioural change, disruptive technologies, etc)
* Missing processes (eg, grid modelling of variable renewables)

1/
...continued
* Bioenergy feedstock prices
* Availability of residues
* Lack of governance

See the paper by Alex Köberle
link.springer.com/article/10.100…

2/
I would also add model structure & implementation. This was implied, but not really discussed in the article.
* End of century constraints leads to peak & decline scenarios, hence more demand for BECCS
* Different types of models & solution methods might preference BECCS

3/
Even in scenarios well over 2°C, IAMs use a lot of BECCS. This is perhaps a consequence of optimising to a end-of-century target. Why would a 3°C scenario use BECCS of ~5GtCO₂/yr?



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