Spanish renewable energy firm Greening Group (<a href="https://www.bmegrowth.es/esp/Ficha/GREENING_GROUP_ES0105709002.aspx" target="_blank">BME:GGR</a>) has formed a joint venture (JV) with Atlantica Sustainable Infrastructure and Edison Next to develop a portfolio of biomethane projects in Spain with a combined capacity of 907.4 GWh, the companies said in a joint statement on Monday.