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.

Litterati creates virtual maps that allow users to report occurrences of littering and uses geo-tagging to highlight problem areas across the globe that require more than just citizen attention.

Japanese company PIRIKA has developed an app encouraging users across the world to do their bit for their local environment and pick up rubbish.