To inform Antigua and Barbuda’s updated Nationally Determined Contribution (NDC), Antigua and Barbuda’s Department of Environment, within the Ministry of Health, Wellness and the Environment, requested technical support through the NDC Partnership’s Climate Action Enhancement Package (CAEP). This report - Antigua and Barbuda’s National Greenhouse Gas Reduction Report - supported by Climate Analytics, assesses the greenhouse gas emissions in the energy and transport sector, and undertakes a technical analysis of renewable energy needs under different pathways to reach the mitigation targets for possible inclusion in the updated NDC.