Helsinki attracts visitors by promising them a vibrant urban culture combined with pure nature. To support its positioning strategy as one of the most sustainable cities in the world, Helsinki has been addressing barriers to a sustainable lifestyle and making sure that the proposed benefits stand apart from those of competing cities. Across the globe, cities and communities are implementing sustainability initiatives and projects targeting greener infrastructure, economic development, zero-carbon mobility, and cultural recreation. But what makes some of these projects more likely to deliver impactful results in the long term? How can some of these initiatives help make communities more sustainable and resilient in the years to come?