NEW YORK/BRUSSELS — In the global fight against climate change, there has been no shortage of targets and commitments. But people ultimately judge progress by what they experience in their daily lives. And nowhere is the impact of climate action more tangible than in the world’s cities. Mayors understand that the same measures that reduce greenhouse-gas (GHG) emissions and strengthen climate resilience also improve people’s daily lives. Energy-efficient homes lower the families’ bills. Increased access to renewables reduces dependence on imported fossil fuels and vulnerability to spikes in oil and gas prices. Better public transport and safer cycling infrastructure give people more affordable and healthier ways to move around their communities. Trees and green spaces improve air quality, cool neighborhoods, and make cities more pleasant places to live. But climate action is also about protecting people from the already tangible effects of a warming planet. Heat waves, floods, droughts, and extreme-weather events are becoming more frequent and intense. Cities and their residents