With song, dance and swirls of color in stark contrast to the seriousness of the official talks a few kilometers away in Cali at the UN biodiversity summit, activists and ordinary citizens visit the COP16 Green Zone. This part educational, part festive showcase of Colombia's natural, cultural and culinary riches has attracted some 2.4 million people. "The atmosphere is great," says a Dutch tourist. "Now I get to experience salsa night," she adds. IMAGES AND SOUNDBITES