Fictional Scenario - Suppose you are out camping and are stuck somewhere. One of the ways that you decide you can safeguard yourself is by creating smoke to keep predators away. So what are the naturally occurring substance which when burnt would produce dense white smoke ? e.g. leaves or fruits or some extracted sap from some tree.

Wet wood does not count.

Fictional Scenario - Suppose you are out camping and are stuck somewhere. You want to create a signal of white smoke to attract help.

So what are the naturally occurring substance which when burnt would produce dense white smoke ? e.g. leaves or fruits or some extracted sap from some tree.

Wet wood does not count.