This document discusses natural resources and their importance. It defines natural resources as materials from the Earth that support life, including air, water, soil, oil, coal, and metals. Natural resources are vital because they provide food, fuel, and raw materials. The document then focuses on the atmosphere, explaining that air contains oxygen and nitrogen essential for survival. It describes the atmosphere's role in regulating Earth's climate by trapping heat and blocking radiation. Uneven heating of land and water causes wind patterns and rainfall, upon which ecosystems depend.