For example, the stocktake will consider the overall effect of NDCs, yet information on the expected impact of NDCs on future levels of GHG emissions is unlikely to be reported or available for many NDCs. Further, a large number of INDCs have been expressed in non-GHG terms (e.g. goals for renewable energy, energy efficiency, forest cover, creation of institutions), and estimating the expected impact of such goals on future GHG emissions is often challenging. Reporting by individual Parties on support provided under the Paris Agreement is unlikely to provide such an overview, even with voluntary reporting by a larger number of Parties.