Answer: $0
Step-by-step explanation:
In order to claim a loss on the sale of land, there has to be an actual sale of land in the first place. Albert is not selling this land as of yet and so he cannot claim any losses on it.
One cannot claim losses simply because the land fell in value, that would be speculative and not how the law works so until Albert decides to and sells the land, there can be no losses claimed.