[Stoves] New paper on atmospheric Black Carbon

[Carefreeland at aol.com]

I wonder if anyone has tried to clean up contaminated land with  biochar?  
What effect would it have on heavy metals or oil based  contaminants? Lots 
of prime real estate worthless because of trace contaminants. 
    
    Dan Dimiduk 
 
 
In a message dated 1/18/2013 5:34:45 P.M. Eastern Standard Time,  
rongretlarson at comcast.net writes:

Kevin,  Crispin and list:

This is to also answer the two following  messages from yourselves.  I did 
not find them helpful - as they assume  the only economics relate to the 
carbon credit.  They assume nothing  (repeat nothing) about the value to the 
user in outyear ag benefits.   Tell me how farmers in the world will react to 
news that (for example) land  worth zero today can be brought up to a 
productivity level the same as other  existing ag land nearby (same rainfall etc.) 
  Let's say that land  can, after applying biochar be worth $500/ha rather 
than $0/ha.   If  those farmers have a discount rate of 5% or 50% will make 
a big difference on  how much they will be willing to spend per tonne of 
biochar and how many  tonnes per ha  (which could be in rows or holes - not 
uniformly  scattered).   Which discount rate are you using for these out-year  
benefit computations? 
You can't prove biochar is  worthless by talking to this list only about 
credits of $6/tonne  CO2.


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