Conservation of Natural Resources Questions in English

(C) Water is considered a renewable resource because it is continuously recycled through the hydrological cycle (water cycle). Through processes like evaporation,condensation,and precipitation,water is naturally replenished in the environment,allowing it to be used repeatedly over time.

(C) The total volume of water on Earth is vast,but only a small fraction is fresh water.
Of the total fresh water available,the majority is locked in polar ice caps and glaciers.
Approximately $68.7\%$ of all fresh water is stored in ice caps and glaciers,making it the largest reservoir of fresh water on the planet.
Therefore,the correct option is $C$.

(D) Nuclear energy is considered a clean source of energy because nuclear power plants do not burn fossil fuels to generate electricity. Consequently,they do not release $CO_2$ (carbon dioxide) into the atmosphere during the energy production process,unlike coal,oil,or the combustion of organic compounds.

(B) Fossil fuels such as coal,petroleum,and natural gas are formed from the remains of ancient plants and animals that were buried under the Earth's surface millions of years ago.
These organic materials undergo a slow,complex transformation under high pressure and high temperature conditions over geological time scales.
Since this process occurs in nature without human intervention,it is classified as a natural process.

(A) Terracing is a method of farming used on hilly or mountainous terrain.
By creating flat steps or terraces on slopes,the velocity of flowing water is reduced,which significantly decreases soil erosion and allows for better water retention for crops.

(D) Dendrothermal energy involves the combustion of biomass (wood/plant material) to generate electricity,which is a direct product of photosynthesis.
Biogas is produced by the anaerobic decomposition of organic matter,primarily plant-based waste,which also originates from photosynthetic activity.
Since both energy sources rely on the biomass produced by green plants through photosynthesis,the correct answer is $(d)$.

(A) The restoration of ecological equilibrium in mined areas is primarily achieved through the process of ecological succession,which is initiated by revegetation.
Revegetation involves planting native species of plants in the degraded mined habitats.
This process helps in stabilizing the soil,improving soil fertility,restoring the nutrient cycle,and providing habitats for various organisms,thereby gradually restoring the ecosystem to its original state.

(C) The concept of 'Social forestry' was introduced in $1976$ by the National Commission on Agriculture $(NCA)$.
It aims at the management and protection of forests and afforestation on barren lands with the purpose of helping in environmental,social,and rural development.
It involves the participation of local communities and village bodies in raising quick-growing,multipurpose plants on common village lands to meet the requirements of fodder,firewood,and small timber for the rural population.

(B) If half of the Earth's forest cover is removed,it would lead to the destruction of habitats for a vast variety of organisms. This loss of biodiversity disrupts food chains and food webs,which directly results in a significant rise in pollution,loss of species,and a severe ecological imbalance. Therefore,option $(B)$ is the most comprehensive consequence.

(C) The term $Jhoom$ cultivation refers to the traditional method of shifting cultivation practiced by tribal communities. In this system,a patch of forest land is cleared by cutting and burning the vegetation. The land is then used for agriculture for a few years until the soil fertility declines. After that,the area is abandoned to allow the forest to regrow,and the cultivators move to a new patch of land. This practice is also known as slash-and-burn agriculture.

(C) Soil fertility is naturally maintained through the process of nutrient cycling.
Microorganisms,such as bacteria and fungi,decompose organic matter (dead plants and animals) present in the soil.
This decomposition process releases essential nutrients back into the soil,making them available for plant uptake.
Therefore,the activity of microorganisms is the primary biological factor that sustains soil fertility without external chemical inputs.

(C) Geothermal energy is derived from the internal heat of the Earth.
Since this heat is continuously produced by the decay of radioactive elements and the residual heat from the planet's formation,it is considered a renewable energy source.
It is classified as a nonconventional energy source because it is not as widely or traditionally used as fossil fuels like coal or petroleum.

(C) Water conservation aims to manage water resources sustainably. The most significant challenge in water conservation is to minimize the loss of water through surface run-off. When water flows over the land surface as run-off,it is often lost to oceans or polluted,rather than being stored or allowed to percolate into the ground to recharge aquifers. Therefore,reducing run-off is crucial for effective water management.

(C) Energy plantation refers to the practice of growing fast-growing trees or crops specifically for the purpose of producing energy (such as biomass or biofuels).
This method is considered eco-friendly because it promotes the use of renewable energy sources,helps in carbon sequestration,and reduces dependence on fossil fuels.
Therefore,energy plantation is a sustainable and environmentally friendly approach.

(D) Coal deposits in India are primarily categorized into two geological ages: Gondwana coal (Permian age) and Tertiary coal (Eocene to Miocene age).
Tertiary coal deposits are found in various regions of India,including the northeastern states (Assam,Meghalaya,Arunachal Pradesh),Jammu and Kashmir,and the Andaman and Nicobar Islands.
Cretaceous coal deposits are also associated with certain regions in India,including parts of the Rajmahal hills and specific sedimentary basins.
Given the options provided,all these regions contain coal deposits of varying geological ages,including Tertiary and Cretaceous periods.
Therefore,the correct answer is $D$.

(B) The first coal mining in India began in $1774$ at the Raniganj coalfield in West Bengal,initiated by the East India Company.
Raniganj and Jharia are historically significant as the oldest and most prominent coal-producing regions in India.
Therefore,the correct option is $B$.

(D) Petroleum is a naturally occurring,yellowish-black liquid found in geological formations beneath the Earth's surface.
It is commonly referred to as $Rock \ oil$ because it is extracted from rocks.
It is also known as $Mineral \ oil$ due to its geological origin.
In some contexts,the term $Naphtha$ is also used to refer to specific fractions or types of petroleum products.
Therefore,all the given terms are used to describe petroleum.

(C) The first recorded commercial mining of coal occurred in England in $1239$ when King Henry $III$ granted a charter to the freemen of Newcastle upon Tyne to dig for coal.

(B) Commercial coal mining in India commenced in $1774$ when John Sumner and Suetonius Grant Heatly of the East India Company began mining operations in the Raniganj Coalfield along the western bank of the Damodar River.
Since $1774$ falls within the $18^{th}$ century, the correct answer is $18^{th}$ century.

(C) Appropriate and better investment in health,education,and infrastructure is essential for the overall development of a country.
This development leads to the improvement of living standards,which indirectly helps in solving both global and personal problems.
Therefore,the most comprehensive answer is the development of the country,which encompasses the other options as outcomes.

(B) The accumulation of national resources and the act of saving these resources for future use or investment is defined as National saving. This process is essential for the economic stability and development of a country.

(D) The Forest Research Institute $(FRI)$ is a premier institution in the field of forestry research in India. It is located in Dehradun,Uttarakhand. It was established in $1906$ and is one of the oldest institutions of its kind.

(A) renewable resource is a natural resource that can be replenished or replaced by natural processes at a rate comparable to its rate of consumption.
Forests are considered renewable because trees can be replanted and grow back over time,unlike fossil fuels such as coal and petroleum,which take millions of years to form and are non-renewable.
Although forests can be exhausted if over-exploited,they have the capacity for regeneration,making them a renewable exhaustible resource.

(D) renewable source of energy is one that can be replenished naturally over a short period of time.
$A$. Petroleum is a fossil fuel and is non-renewable.
$B$. Coal is a fossil fuel and is non-renewable.
$C$. Nuclear fuel (like Uranium) is finite and non-renewable.
$D$. Trees are a biological resource that can be regrown through reforestation and sustainable management,making them a renewable source of energy.

(D) Dioscorea is a genus of flowering plants in the family Dioscoreaceae.
Many species of Dioscorea are known for their medicinal properties,particularly for the production of diosgenin,which is used in the synthesis of steroid hormones.
Due to excessive collection and over-exploitation from the wild for medicinal purposes,many species of Dioscorea have become threatened or endangered.
Therefore,it is included in the list of endangered plants.

(D) The Forest Research Institute $(FRI)$ is a premier institution in the field of forestry research in India. It is located in Dehradun,Uttarakhand. It was established in $1906$ and is one of the oldest institutions of its kind.

(B) Gujarat has the longest coastline among all the states in India.
The total length of the coastline of Gujarat is approximately $1600$ km to $1640$ km,depending on the measurement criteria used by different geographical surveys.
However,in the context of standard geographical data for competitive examinations,$1600$ km is the most widely accepted figure for the coastline of Gujarat.

(D) : Exhaustible resources are those natural resources which are likely to be exhausted or diminished as a result of their continuous use.
These are further of two types: renewable and non-renewable.
Forest is a renewable exhaustible resource which can be again generated or produced artificially or naturally.
Coal,petroleum,and minerals are non-renewable exhaustible natural resources which cannot be again produced or generated.

(C) The correct matches are as follows:
$(a)$. World Forestry Day is celebrated on March $21$ $(iii)$.
$(b)$. World Animal Day is celebrated on October $4$ $(iv)$.
$(c)$. World Habitat Day is celebrated on October $3$ $(i)$.
$(d)$. World Environment Day is celebrated on June $5$ $(ii)$.
Therefore, the correct sequence is $a(iii), b(iv), c(i), d(ii)$.