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.

Staying cool is nothing new: Romans & Egyptian methods
Ding Huan & the rotating fan
Why people were afraid of creating cold artificially
How the Dutch magician Cornelis Drebbel tricked King James I in 1620
Benjamin Franklin getting sweaty one July in Philadelphia
Primitive air conditioning by pumping air over ice
Did people actually mind that there was no air conditioning?
Willis H. Carrier & the first air conditioning unit
Convincing the US public that it was something they needed
1920s sweaty American cinemas
Spending $600,000 on an air conditioning unit in 1932
The boom of air conditioning in the US
How many households around the world have air conditioning in 2021?
The impact of air conditioning: the good, the bad & the unexpected
Environmental impact of air conditioning
Future of air conditioning in the developing world
New air conditioning technologies: high & low tech

Full interactive transcript, subtitles and key vocabulary available on the website: https://www.leonardoenglish.com/podcasts/air-conditioning

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