This is an unconditional target, based on domestically supported and implemented mitigation measures and policies. Conditional contribution: An additional reduction of 45 per cent relative to BAU in the year 2040; equivalent to an estimated mitigation level of 15.6 million tCO2 e in that year. This represents an additional targeted contribution, based on the provision of international support and funding. The combined unconditional and conditional contribution is therefore a 51 per cent reduction in GHG emissions compared to BAU in 2040, expressed as a single year target; this is equivalent to an estimated mitigation level of up to 17.7 million tCO2 e in 2040. The coverage of the contribution includes the three main greenhouse gases carbon dioxide (CO2 ), ), and nitrous oxide (N2 O).