Air conditioners have long been considered a climate killer. Not only do they consume huge amounts of energy, but the coolants they use are catastrophic for the environment. Still, air conditioners are crucial in industries, hospitals, food logistics and other sectors. This week, we take a closer look at an Indian company working to turn out eco-friendlier, energy efficient air conditioning systems. Producing and operating green cooling systems is not cheap. In our in-depth text, we explore new international financial instruments to encourage climate-friendly investments.