Joining a European project can be an excellent way of increasing your ambition level and budget for climate actions. Apart from an idea, you of course need to find a suitable programme and partners. There are some excellent partner search tools for that online, for example: Interreg NWE (https://www.nweurope.eu/apply/submit-an-idea/) , Erasmus+ (https://epale.ec.europa.eu/nl/partner-search), Interreg Vla-Ned (only for cross-border projects in Flanders and Netherland:https://www.grensregio.eu/mijn-project/partnersearch). This one on the EC's funding and tenders portal is probably the most comprehensive one: https://ec.europa.eu/info/funding-tenders/opportunities/portal/screen/how-to-participate/partner-search . If you know any more, post them in a reply!