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Civil aviation authorities, working with their airport, airline and aviation business partners, are developing plans to achieve carbon-neutral aviation growth from 2020. This paper discusses how, in order to meet this goal, the International Civil Aviation Organization (ICAO) Member States have agreed to a basket of measures for reducing carbon dioxide emissions from international aviation. One effective measure identified is replacing aircraft auxiliary power unit emissions with gate electrification systems and solar power as described in the United Nations Clean Development Mechanism small-scale methodology: solar power for domestic aircraft at-gate operations. ICAO, with funding support from international partners, has recently completed three airport pilot projects — in Cameroon, Jamaica and Kenya — that demonstrate how States can implement the solar at-gate measure. Beyond the direct application to auxiliary power units and gate electrification, the solar at-gate concept offers a more general approach as to how other airport electrification conversion projects, including ground support equipment, airport ground transportation and passenger vehicle use, can maximise emission reduction benefits by eliminating fossil-fuel combustion and replacing it with carbon-free electricity. This paper discusses the solar at-gate example, which demonstrates the opportunities associated with maximising airport electrification and supplying the new electricity demand with clean energy for carbon emission reductions consistent with the global efforts to address climate change, and at the same time, accelerating the achievement of the Sustainable Development Goals (SDGs) through innovation for a greener future. [ABSTRACT FROM AUTHOR]