"You shouldn't be turning on all the air-conditioners in the house." I told Mr. B. today.
"Are you kidding? With this heat?" he said. It was about 38 degrees Celsius outside but the inside of our apartment was comfortable.
"You are contributing to global warming." I said sternly. "You are only making the weather hotter and hotter until one day even air-conditioners will not be enough!"
"I don't understand what you are saying."
"You see, air-conditioners uses refrigerants in order to work. These refrigerants are commonly used due to their superior stability and safety properties. However, it has been shown that these chlorine-bearing refrigerants reach the upper atmosphere when they escape. Once the refrigerant reaches the stratosphere, UV radiation from the Sun cleaves the chlorine-carbon bond, yielding a chlorine radical. These chlorine atoms catalyze the breakdown of ozone into diatomic oxygen, depleting the ozone layer that shields the Earth's surface from strong UV radiation." I told him.
"And just where did you get all these?"
"I just read it in Wikipedia!" I proudly said. "So you see, by making our house cool, you are actually making the Earth hot!"
"What an irony!" Mr. B. declared, then decided to turn the air-conditioners off. "I guess we should just make ourselves some iced tea and just sit still in front of the TV and not move so we won't perspire."
"That's a great idea!" I told Mr. B.
And it was. At least for the next 2 hours until we had to turn all the air-conditioners plus 2 more electric fans again. What a great summer!