This month, CNN International presents the half-hour special Going Green exploring the individuals who are passionate about their environmental causes, and their belief that responsibility for the planet begins at home. Fronted by Nicki Shields, tech presenter and host of CNN International’s Supercharged, Going Green is hosted from Findhorn, the world-renowned eco community in Scotland.

Furthermore, the programme presents self-authored reports from across the globe, including Fai Hun, a farmer, lecturer and the figurehead behind one of Hong Kong’s biggest online green networks, Go Green Hong Kong. In Hun’s opinion, rooftop farming is about more than growing fresh food. It’s about reducing food miles and carbon emissions.