Freon gas and HFC for aircon refrigerants are the main causes of global warming through the destruction of the ozone layer. At the beginning of the hot summer, countless air conditioners operate, and many existing aging or broken air conditioners are damaged and discarded without proper procedures and attention, resulting in the outflow of Freon gas. The resulting global warming brings back even more severe heat and heat waves for people. Summer gets longer and longer, eventually adding to the vicious cycle of heat. The photo shows people suffering from severe heat even more even though numerous aircon outdoor units are running to escape the heat.