[BONUS: REPLAY] The Rise of Air Conditioning

It has gone from luxury to necessity, and there are over 2 billion air conditioning units in the world today. In this episode, we'll take a look at how air conditioning got started, why people didn't mind being hot in the past, and what the true cost of staying cool might be for future generations. Full transcript, subtitles and key vocabulary available (FREE) on the website: https://www.leonardoenglish.com/podcasts/air-conditioning