Trump has cast the climate accord as elitist, saying when announcing his decision that he was "elected to represent the citizens of Pittsburgh, not Paris."
Spain will host the COP25 climate summit in December, the UN said on Friday, after Chile abandoned plans to hold it due to deadly anti-government protests.
Attendees at the Costa Rica event proposed the end of fossil fuel subsidies, the preservation of nature and the promotion of clean and renewable energy as a path for this new model.
