Methodological issues under the Kyoto Protocol : ( a ) Carbon dioxide capture and storage in geological formations as clean development mechanism project activities ; ( b ) Implications of the establishment of new hydrochlorofluorocarbon-22 ( HCFC-22 ) facilities seeking to obtain certified emission reductions for the destruction of hydrofluorocarbon-23 ( HFC-23 ) ; ( c ) Implications of the inclusion of reforestation of lands with forest in exhaustion as afforestation and reforestation clean development mechanism project activities ;