For Earth Day 2018, Pokemon Go will invite players of the AR title to earn in-game rewards for picking up rubbish at selected events. Organised in collaboration with NGOs and social enterprises, the move appeals to tech-savvy Gen Z’s desire to be environmentally sustainable.

Chinese mobile payments leader Alipay is incentivising citizens to engage in low carbon footprint activities. More than 280 million people in China are already going green with the Ant Forest app, which provides an easy and fun way to actively contribute to ecological causes they hold dear.

An anti-litter project dreamt up by Keep Britain Tidy and The Wrigley Company has transformed street bins into charity collection tins, promising to donate an amount of money proportional to the amount of rubbish collected. And it's led to a 30% reduction in local litterering.

Japan has one of the highest suicide rates in the world but people are hesitant to seek support for mental health issues. Hikari Labs sidesteps the stigma by offering cognitive behavioural therapy through a combination of online counselling and a 'self help' video game called SPARX.