| 摘要 |
Some embodiments of the invention provide a method of automatically bundling environmental conservation items with computed environmental conservation values into "credit blocks" so that the aggregate sum of the environmental conservation values of the items in a particular block is sufficient to issue a tradable environmental commodity, also referred to as a credit. In some such embodiments the various different items represent items with different forms of environmental conservation such as emissions reductions, energy savings, hazardous waste reductions, or generated renewable energy. In some embodiments, credits with at least one expired item are unbundled and the at least one expired item is removed from the credit block. Some embodiments replace the at least one expired item with at least one valid item having the same or a similar environmental conservation value. |
