UNEP/EA.5/22 Progress in the implementation of resolution 4/1 on the programme of work and budget for the biennium 2020-2021, resolution 2/20 on the proposed medium-term strategy for 2018-2021 and programme of work and budget for 2018-2019 and resolution 1/15 on the proposed programme of work and budget for the biennium 2016-2017: Report of the Executive Director