This report presents the objectives, methodology, procedures and main findings of the OECD project "Strengthening public finance capacity for green investments in the EECCA countries". Between 2016-19, the project aimed to help set the partner countries (Kazakhstan, Kyrgyzstan and Moldova) on a sustainable path of development by reducing the energy and carbon intensity of their economies. Working with the relevant ministry in each country, the project designed public investment programmes in line with good international practices. These programmes sought to address key objectives of the countries' environmental and climate-related policies. The Clean Public Transport Programmes focus specifically on reducing air pollution and greenhouse gas emissions from the target sector, primarily in large urban areas. They aim to demonstrate how to use scarce public funds to encourage private sector investment in projects that generate significant environmental and socio-economic benefits alike.