Key Points

Natural resources are essential resources provided by nature, such as air, water, sunlight, forests, and soil, that sustain all life forms on Earth.

Air is a mixture of gases, primarily nitrogen (approximately $78\%$) and oxygen (approximately $21\%$), with argon, carbon dioxide, and other gases making up the remaining $1\%$.

Oxygen in the air is vital for the survival of most living beings, as it is required by the body to perform its functions through breathing.

Moving air is called wind, which can be harnessed by devices like firkis and windmills to perform tasks such as grinding flour, pumping water, and generating electricity.

While water covers about two-thirds of Earth's surface, most of it is saline ocean water; accessible freshwater in rivers, lakes, and wells is a very small and precious fraction.

Conserving water involves reducing wastage, fixing leakages, recycling water, and implementing rainwater harvesting techniques like stepwells (Bawadi/Vav) to store water for later use.

The Sun is the main source of energy on Earth, providing heat and light essential for all plants and animals, enabling processes like photosynthesis and supporting life cycles.

Solar energy from the Sun can be directly used for drying, cooking in solar cookers, heating water in solar water heaters, and generating electricity via solar panels.

Forests are natural homes for diverse wild animals and plants; their roots prevent soil erosion, and decaying leaves enrich the soil with nutrients, demonstrating natural recycling.

Soil is formed over thousands of years by the slow disintegration of rocks due to the actions of the Sun, water, and living organisms, leading to different soil types that support biodiversity.

Rocks are used in construction and tools, while minerals, which make up rocks, are sources for important metals like gold, copper, and iron, used in various industries and electronics.

Fossil fuels, including coal, petroleum, and natural gas, are formed over millions of years from the buried remains of ancient microorganisms and plants.

Fossil fuels are non-renewable resources because they exist in limited quantities and take millions of years to form, making them exhaustible if used at current rates.

Burning fossil fuels releases smoke and carbon dioxide, leading to air pollution and environmental degradation, highlighting the need for alternative cleaner energy sources.

Renewable resources are natural resources, such as air, water, and forests, that get renewed, replenished, or restored by natural processes within a reasonable period.

Non-renewable resources are natural resources, like minerals, rocks, coal, petroleum, and natural gas, which are in limited quantities and do not get replenished within a reasonable timeframe.

It is crucial to conserve natural resources and use them responsibly to fulfill present needs without wasting them, ensuring their availability for future generations and protecting the environment.