Greg is right about the importance of doing the numbers. I was surprised at how carbon efficient it would be to barge crop residue to the sea. I thought that much more fuel would be required than it turned out.
To me it is all about the carbon. If an engineer wants to remove carbon from the atmosphere he/she first looks at where the greatest amount of carbon is processed and how to most efficiently process and store it, avoiding leaks and losses of the precious C. Then what storage is least leaky? It is not easy to remove carbon from the atmosphere. Even with the high efficiency of CROPS we can only get half a stabilization wedge globally, an effect that would probably be measurable, but not assuredly. I fear that another process using crop residue with less efficiency would produce no measureable effect on global CO2. As for the classification of crop residues (straw and corn stover) as wastes, dredge spoils are permitted, I believe. Iron fertilization is quite different from deposition of plant materials in river sediments that receive plant inputs all the time. = Stuart = --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "geoengineering" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en -~----------~----~----~----~------~----~------~--~---
