There are tonnes of good ideas that can change the world. Regular readers of RESET will already know of a few. Every month, we will choose one idea that stands out thanks to its impact and innovative approach. Our favourite project in May: South Korea's innovative approach to managing food waste. Read on

Remember that romanticised notion of placing a message in a bottle, putting it in the ocean and wistfully dreaming about where it would end up? Well, thanks to organisations like Adrift, you can track the whereabouts of your bottle – and almost every other bottle thrown into the ocean. Read on