Climate and Clean Air in Latin American Cities Programme Poor health resulting from air pollution costs billions of dollars annually in medical costs and lost productivity. Fast action to reduce air pollution can have a direct and more cost effective impact on climate change in the near term. The programme will support the alliance of key Latin American cities committed to taking action and making a difference on two fronts at once that will benefit the most vulnerable: air pollution and climate. The intervention will enhance South-South knowledge exchange capitalising on a successful and long-standing Chilean-Swiss partnership.