We look at a new technology called Triporous – a porous carbon material made from rice husks – and discuss the various global issues it could help to solve. These range from the disposal of biomass waste to purifying water in developing countries.

As the issue of plastic pollution in the seas climbs the agenda, we meet Dr Sanae Chiba from the Japan Agency for Marine-Earth Science and Technology to find out about the country’s efforts to clean up its oceans, and how Japan’s research into microplastics could help other nations around the world.