The document discusses different tropical environments and climates. It begins by explaining that the Inter Tropical Convergence Zone (ITCZ) on average is located about 50 north of the equator but varies seasonally based on the sun's position. It then states that the ITCZ is the most important factor in the migration of low pressure belts and seasonal shifts in tropical rains. It goes on to briefly describe the climates of tropical rainforests, tropical monsoons, and tropical savannas.