The document discusses cities leading efforts to address climate change. It notes that 62% of cities have developed climate action plans, 50% have special units in mayors' offices for climate policy and action, and 60% have established greenhouse gas reduction targets. Cities are collaborating and pioneering new technologies with local businesses. Addressing climate change is improving energy security and life quality while sharpening competitive advantages for cities like Hong Kong. The document encourages cities to take climate action to the next level by investigating funding, engaging businesses and NGOs, and reporting climate data to CDP.