Assessment of cross-border regional green economy development opportunities in the renewable-based energy supply of the district heating systems of the cities of Kecskemét and Sombor, the impact of the developments on the economies of both regions (industry, agriculture, job creation) and ways of linking the project to the green city concept. The primary objective of the project to be implemented by the Bács-Kiskun County Chamber of Commerce and Industry and the Sombor Chamber of Industry is to promote cross-border cooperation between an EU Member State and a candidate country for accession to the EU. We intend to enhance the regional economic development impact of renewable energies by implementing the project. We will assess the availability, feasibility and long-term sustainability of the required renewable energy input in both regions.In the light of the results, we intend to make a recommendation as to the partial or, potentially, full conversion of the systems of the district heating plants involved in this project to renewable energy sources. During the assessment of the availability of renewable energy sources, we intend to analyse the availability of agricultural and communal waste in both regions as they can serve as input for the energy systems of the district heating plants. We will organise several conferences during the project with the aim of presenting the objectives and topics of the project as well as the results achieved. Furthermore, the aim of this project is to launch a green economy model and to identify the opportunities of linking to the green city concept. Even though the availability of labour and the level of economic development are different, the project will contribute to the economic development of the region by creating new jobs while developing the green economy. Achievements: Green economy and renewable energy sources are crucial and topical themes, especially when it comes to envisaging economically and environmentally sustainable future. The project partners, two regional chambers of commerce, recognised the need to address the issues of economic development and policies in the region from the perspective of their sustainability. They assessed the availability, feasibility and long-term sustainability of the renewable energy input required in both regions. On the basis of their research and analyses, they devised a technical and green economic model for the border region presented in the two major strategic documents as a green economy development model and a feasibility study. While assessing the availability of renewable energy sources, they analysed the availability of agricultural and communal waste in both regions as they can serve as input for the energy systems of the district heating plants. In order to introduce the green economy development model to the relevant industry and economy stakeholders, municipal officials and regional decision-makers, the partners organised several conferences, thus kick-starting discussion and dialogue among the participants. Apart from presenting the objectives and themes of the project as well as the achieved results, the partners made recommendations as to the partial or, potentially, full conversion of the systems of the district heating plants involved in this project to renewable energy sources.In order to introduce their results to the general public, the partnership distributed brochures about renewable energy sources, held public meetings and consultations and attracted the interest of the local and regional media.This project is the start of a long-term process in the cross-border region, which may result in more environmentally sustainable economic development, creation of new jobs, and a healthier environment.