Humans are hot-blooded animals.
We emmit heat.
How much?…
Some scientist called Josef Stefan, in 1879, gave birth to an equation called Stefan-Boltzmann equation, that can help us calculate stuff like that!
Aproximating, you need 4 medium-sized healthy people to produce the same heat than a 1000W stove.
Heavy, isn’t it? now imagine how much heat generate a class full of students taking an examn, or the audience of a massive concert … up to your imagination 🙂
The Lost Dimension 