Go Green!

 is a Special Mission in which the player may only use towers and upgrades that do not hurt the environment in any way, or use nature itself as a weapon. For example, Lightning Bolt can be used, because lightning is a part of nature, but Fireball cannot, because fire can burn plants. Anything that spews smoke also cannot be used, because smoke pollutes the air. The player must survive rounds 1-75 on Park Path, medium. The player earns 100 MM and 25 AP upon completion.