This document discusses air and water as natural resources. It describes air as invisible but necessary for breathing. It defines different types of winds like breezes, gales, and storms. It then discusses how wind is used and some properties of air. The document then discusses water, describing its three forms (solid, liquid, gas), where it is found on Earth, and its uses. It emphasizes that humans, animals and plants need clean water to drink. In the end, it summarizes some key properties of water.