Assuming it’s like the others then I believe they will treat it as an investment loss which allows them to take some percentage of the loss as a tax deduction.
I don’t know how the law works but suspect it makes an eventual return to any form of media unlikely.
Source for the curious.
https://www.dezeen.com/2019/07/27/refreezing-the-arctic-geoengineering-design-climate-change/