Bill Nye explains that wind is caused by the heating and the cooling of the Earth. The Sun warms the air, causing it to move faster and spread out, and cold air pushes the warm air up. Wind comes from all different directions since it moves with the rotation of the Earth.
Flik heads off into the unknown world to find help against the grasshoppers. On his way to the unknown, he faces a dilemma: finding a way over the huge cliff. Flik comes up with an idea to climb up a dandelion stalk and travel with the seed as it is carried by the wind.