They are supposed to be the climate-savers’ gold standard — the key data on which the world relies in its efforts to lower greenhouse gas emissions and hold global warming in check. The proof of these greenhouse-gas bookkeeping failings lies in the real atmosphere. By one recent count, national emissions inventories total just 70 percent of the actual additions to the air, as calculated using remote sensing and model analysis. The remaining 30 percent are unaccounted for. As a result, say analysts, the world is flying blind, unable either to verify national compliance with emissions targets or figure out how much atmospheric “room” countries have left for emissions before exceeding agreed warming thresholds.