Question

Why do green leaves not caught fire easily

Answer 1

Because green leave contain liquids in it such as water starch, therefore when green leaves are exposed to high temperature first the fluid evaporates and then the leaves start to burn but in case of dry leaves there is no fluid or moisture only dry leaves which is pure carbon fuel and too good fuel to burn.

Answer 2

Green leaves do not catch fire easily because
leaves contain moisture which prevents leaves from catching fire