We adopt this as the degree of implementation, which we will require other countries to achieve by 2030 (although the base to which the percentage is applied varies depending on assumptions, see below). Thetype of geological formations used forstorage is also usually found where oil and gas are found, so availability of storage is not likely to be a significant limitation. The economic incentive to implement CCS is the major obstacle, but we assume that all governments of Annex I countries ofthe UNFCCC, will have the financial and organizational muscle to implement the incentives needed (see section 3.1.7).