I've come across an interesting article from the Behavioral Scientist about Cape Town, South Africa using behavioural science to overcome its water crisis. The city created a "Day Zero" campaign, Day Zero being the point at which the water supply to most of the city would be turned off. The city developed a comprehensive behaviour change strategy including compulsory water restriction devices, fines, water pressure management, water rationing, and easy-to-understand messaging. The city also implemented fun and interesting measures like two-minute shower songs, a water map and water savings initiatives in schools. How successful were they? Check it out here!