What is a key principle of C40’s approach to climate solutions?

The principle that solutions must be scalable and replicable is central to C40's approach to climate solutions because it emphasizes the importance of not only developing effective strategies for individual cities but also ensuring that these strategies can be adapted and implemented in various contexts around the world. This scalability allows for broader adoption and impact, enabling cities facing similar climate challenges to benefit from proven solutions.

By focusing on strategies that can be implemented by multiple cities, C40 aims to drive collective action on climate change, creating a network effect where experiences and lessons learned can be exchanged and improved upon. This ensures that successful initiatives do not remain isolated successes but instead become part of a larger movement towards urban resilience and sustainability.

The other options, while important in their own right, do not capture this broad and interconnected approach. Cost-effectiveness, community needs, and a focus solely on renewable energy are significant aspects of climate solutions but do not encompass the imperative for solutions to be adaptable across different urban environments, which is crucial for achieving widespread impacts in the fight against climate change.