 Participants then trade goods and services with one another to obtain enough of the currency to cover their actual emissions.The objective of an allocation scheme is to obtain social parity between participants with regards to emissions reductions.Technically an emissions crediting scheme, an allocation scheme is classed as an emissions reduction currency system because the trading of the currency between individuals as parity is sought can create a secondary market of trading where the currency can act as a medium of exchange, and this trading creates an additional positive economic value associated with emissions reductions.