Environment 01
Why Does a Cold Glass Sweat? The Dew Point Explained
The water on a cold glass comes from the air, not the drink. It forms when the glass is colder than the dew point. Here is how to work that out.
humidity
Environment 02
Why Does Humid Heat Feel Hotter Than Dry Heat?
Sweat only cools you when it evaporates, and humid air slows that down. The heat index puts a number on it: 32 °C at 70% humidity feels like 40 °C.