How is diffusion related to smelling the odor of a skunk that is far away

Diffusion is the idea that when a solute enters an area with a lower concentration than the solute, it will mix into the area. So the skunk odor has a higher solute concentration then the atmosphere it's released into, so when it is released it will diffuse across a wider area in order to try and level out the level of concentration. This means it can be smelt from further away. 

Methane———————————