A €500,000 financial injection. That is what is at stake for the five entrepreneurs who made it into this year's final of the Postcode Lottery Green Challenge! We are proud and honoured to introduce our five finalists:

Our first finalist is The Great Bubble Barrier, a Dutch start-up that has developed an air bubble screen for use on riverbeds that catches plastic before it arrives at sea.

The Great Bubble Barrier  

LettUs Grow from the United Kingdom is our second finalist. This start-up has developed an aeroponic method for growing crops by letting the roots hang in a dense, nutritious mist. This lowers water usage and CO2-emissions significantly compared to traditional agriculture.

Product photo LettUs Grow

Our third finalist is a start-up from the United States, AlgiKnit. They make fibres from seaweed that can be spun into yarn. By using biomaterials, AlgiKnit offers a solution that could transform the highly polluting textile industry into a circular economy.


Also from The Netherlands is AquaBattery. This company has developed an energy storage system that uses only water and table salt instead of rare, and therefore expensive, raw materials.

Product photo Aquabattery

Last, but not least, Reverse Recourses from Estonia. They built a software platform where clothing manufacturers can directly align their supply of waste textiles with textile recyclers.

Product photo Reverse ResourcesWinner to be announced during the final on 13 September
The five finalists will attend the final in Amsterdam on Thursday 13 September. Here they will pitch their business plans to an international jury, the press and the public. Follow the final live via our live stream on www.greenchallenge.info.

Image PLGC finalists