How does a rainforest make its own rain?

The trees do it. A big rainforest tree lifts water from its roots to its highest leaves and lets it out as vapour, and across a whole forest that adds up to so much water that scientists talk about flying rivers: enormous streams of moisture moving through the sky above the canopy.

A cloud droplet also needs something tiny to gather on, a speck of dust or pollen or salt, and the forest supplies those too. So the same trees that the rain falls on have helped to make it.