In 2021, domestic transport emissions were around 109 MtCO2e making up around 25% of total UK net GHG emissions (including international aviation and shipping). Road transport constitutes the majority of these emissions. Domestic transport emissions have decreased by 11% since 2019 and 15% since 1990, though 2021 emissions were impacted by COVID-19 and resultant restrictions on movement. In line with the sectoral breakdown of the indicative pathway set out in the NZS, compared to 2021 emissions levels, GHG emissions could fall by 2% to 8% on average over 2023-27 27% to 39% by 2030 and 61% to 73% on average over 2033-37. Please see the Carbon Budget Delivery Plan annex for details of our proposals and policies for meeting the carbon budgets.52 International aviation and shipping were significantly impacted by COVID-19 and resultant restrictions on movement. In 2021, international aviation and shipping emissions were around 20 MtCO2e making up around 4% of total UK net GHG emissions (including international aviation and shipping). In 2019, international aviation and shipping emissions were around 44 MtCO2e making up around 9% of total UK net GHG emissions (including international aviation and shipping).