In a lab in a renovated warehouse on the banks of a churning, brown river in Belém, Brazil, machines are pulping candidates for the next global "superfood". Cupuaçu... Taperebá... Bacaba... Like açaí berries - these strange fruits are rich in antioxidants, fibre or fatty acids. If Brazil has its way, they could soon be popping up on your social media feeds and being sold in fashionable cafes in the UK, Europe and the US. It's part of a bold plan by the country, which is hosting the COP30 UN