Eco v6 pollution removal benefit calculations

[HannahWalker]

Hi,

I have run i-Tree Eco v6 for a complete inventory of a university campus in Leeds, UK.
In the report the cost per kilogram of NO2 is given as £0.535, i.e. £535 per tonne.
I have used the equation quoted in the Eco v6 updates document (from Nowak et al) to calculate the cost per tonne of NO2 in Leeds, assuming a population density of 4066 people per square kilometer. I get £3442 per tonne.
Please could you indicate where the difference in these numbers comes from?

I am also interested in why v6 uses these US-based equations for UK projects rather than the UK social damage costs that were used in the London i-Tree project.

Apologies if I have missed something obvious

Many thanks,

Hannah

[Jason.Henning]

Hi Hannah,
To fully diagnose the difference we would need your project and the exact calculations you performed.
If you would like us to dig into the difference further you can send your packed project to info@itreetools.org along with the reference and exact calculations you were doing. We'll need to know what monetary conversion rate you were using, etc.
Thanks,
Jason

[HannahWalker]

Thanks for your help, I'll do that.