Natural Resources

Sewage treatment, soil pollution control, and the use of filters in chimneys are all standard and effective methods for mitigating various types of environmental pollution.

Ozone is an allotrope of oxygen consisting of three oxygen atoms, hence its chemical formula is O3.

The ozone layer is primarily located in the stratosphere, which spans approximately 15 to 60 km above the Earth's surface.

Silviculture is the branch of forestry that deals with the cultivation, development, and care of forests to ensure the replenishment of tree cover.

Carbon dioxide (CO2) is the primary greenhouse gas responsible for trapping heat in the atmosphere, contributing to the greenhouse effect.

Afforestation is the process of planting trees in an area where there was no previous tree cover, which is a key method for forest conservation and replenishment.

Biomass is considered a renewable energy resource because it is derived from organic matter that can be replenished over a short period of time.

Weathering is the primary process of breaking down rocks, but environmental factors like rain and thunder are often associated with the physical and chemical processes that facilitate rock breakdown.

Sand, silt, and clay are the three basic soil separates that define soil texture and composition.

Biogas is widely promoted in rural India as a cost-effective, clean, and sustainable fuel source derived from organic waste.

Desert soil is characterized by its sandy texture and low organic matter content, making it less fertile for many types of agriculture.

Hydroelectricity is generated by harnessing the energy of flowing or falling water to turn turbines.

In hydroelectric plants, the kinetic energy of moving water is used to spin turbines, which then generate electricity.

Laterite soil is formed under conditions of high temperature and heavy rainfall, resulting in a soil rich in iron and aluminium oxides.

Water (hydroelectric power) and thermal sources are major contributors to India's power generation, with water being a primary renewable source.

Alluvial soil is highly fertile and is typically composed of a mix of loam, silt, and clay, deposited by rivers.

The troposphere is the lowest layer of Earth's atmosphere, extending from the surface to about 8 to 15 kilometers high. It is where most weather phenomena occur.

Black soil, also known as regur soil, is characterized by a high clay content, which gives it excellent moisture-retention properties. Other soil types like mountain or desert soils have different primary compositions.

Nitrogen (N2) makes up approximately 78 percent of Earth's atmosphere, making it the most abundant gas. Oxygen (O2) follows at about 21 percent.

Natural gas is a fossil fuel formed over millions of years, making it a non-renewable resource. Geothermal, solar, and biomass are considered renewable energy sources.

Ozone depletion is primarily caused by chlorofluorocarbons (CFCs) found in aerosols and refrigerants, not by the burning of wood or charcoal. The other statements correctly describe the importance and function of the ozone layer.

Solar radiation is an inexhaustible resource because it is continuously provided by the sun. Forests, wildlife, and minerals are exhaustible if not managed sustainably.

Mono-culture involves growing the same crop repeatedly on the same land, which depletes specific soil nutrients and does not aid in replenishment. Mixed cropping and field fallow are traditional methods to restore soil fertility.

Rubber, polythene, and radioactive waste are all examples of materials that do not break down naturally in the environment, making them non-biodegradable.

Hydroelectric power plants harness the energy of flowing or falling water to spin turbines, which then generate electricity.