The natural resources of Earth include air, water, soil, minerals and living organisms. Air is a mixture of gases that living organisms and combustion processes rely on. It also helps regulate Earth's climate. Water cycles through evaporation, condensation and precipitation in a continuous process. Soil is formed through weathering and supports plant life. These natural resources interact in biogeochemical cycles and sustain life on Earth. However, human activities like burning fossil fuels, industrial pollution and deforestation threaten these natural systems.