Question

Where does water vapor in the air come from?

Answer 1

It comes from lakes and large bodies of water. At least most of it does. A little hit of it comes from transpiration which happens in plants.

Answer 2

Answer:

Heat from the Sun causes water to evaporate from the surface of lakes and oceans. This turns the liquid water into water vapor in the atmosphere. Plants, too, help water get into the atmosphere through a process called transpiration!