INTEGRATED MAINS AND PRELIMS MENTORSHIP (IMPM) 2025 Daily KEY
| Exclusive for Subscribers Daily:
Vultures and Pandemics and Census and its Significance and its significance for the UPSC Exam? Why are topics like Cubit, Indus Waters Treaty (IWT) , Total Fertility Rate (TFR) at 2.0, CHINA-PAKISTAN Economic Corridor (CPEC) important for both preliminary and main exams? Discover more insights in the UPSC Exam Notes for September 12, 2025 |
- For centuries, vultures have served as natural cleaners, disposing of carcasses and curbing the spread of dangerous pathogens such as anthrax, rabies, and Clostridium botulinum. Until the 1980s, it was common to see large gatherings of vultures at dumping grounds.
- India alone had a population exceeding 40 million, but since the 1990s their numbers have plummeted by over 95% because of the use of diclofenac.
- This crisis is not merely ecological—it is also a growing public health concern, showing how biodiversity loss can amplify the risk of future pandemics.
- India’s vultures form an essential part of the Central Asian Flyway (CAF), a major migratory route that links Central Asian breeding habitats to wintering sites across South Asia. This flyway, stretching across 30+ countries, is used by millions of migratory birds each year.
- As vultures and raptors traverse this corridor, they connect ecosystems—and the potential transmission of diseases—across international borders. Sites like landfills, carcass dumps, or temporary stopovers can easily become disease hotspots, making the CAF not just a biodiversity highway but also a corridor of public health importance.
- Strengthening conservation within this pathway provides a crucial chance to integrate ecological security with pandemic prevention.
- Yet, regional collaboration faces hurdles due to funding shortages and weak structural support. Vulture conservation programmes remain under-resourced, fragmented, and insufficiently tied into national One Health frameworks.
- Meanwhile, persistent threats such as poisoning from toxic veterinary drugs and electrocution from power lines continue to undermine recovery efforts
- Vultures are directly linked to pandemic risks because of the ecological role they play in controlling disease spread. These birds are highly efficient scavengers that consume animal carcasses rapidly, leaving little opportunity for pathogens to multiply and spread in the environment.
- In their absence, dead animals remain exposed for longer periods, attracting stray dogs, rats, and other scavengers that are far more likely to transmit diseases to humans. For instance, with the decline of vultures in India due to the veterinary drug diclofenac, there was a noticeable rise in feral dog populations feeding on carcasses. This led to an increase in dog bites and rabies cases, showing how biodiversity loss can create new public health challenges.
- Moreover, vultures are part of the Central Asian Flyway, a major migratory corridor linking over 30 countries. Their movement, and that of other raptors, connects ecosystems across borders.
- If vultures decline, carcasses left unmanaged along this corridor can become hotspots for zoonotic spillovers—where pathogens jump from animals to humans. This is especially critical because many pandemics, including COVID-19, have zoonotic origins.
- Therefore, conserving vultures is not only about protecting a species but also about maintaining a natural barrier against disease outbreaks, highlighting the strong intersection between biodiversity conservation and global health security
1.Vultures which used to be very common in Indian countryside some years ago are rarely seen nowadays. This is attributed to (2012)
(a) the destruction of their nesting sites by new invasive species
(b) a drug used by cattle owners for treating their diseased cattle
(c) scarcity of food available to them
(d) a widespread, persistent and fatal disease among them.
|
Answer (b)
The drastic decline in vulture populations in India since the 1990s was primarily due to the veterinary drug Diclofenac, given to cattle to treat inflammation and pain. When vultures fed on carcasses of cattle treated with this drug, it caused kidney failure and death in vultures
|
-
The first attempt at a nationwide, but non-synchronous census in India took place in 1872. It covered most regions of the country but excluded some territories under British control.
-
The first synchronous census was carried out in 1881 under the supervision of W.C. Plowden.
-
The upcoming Census 2027 will mark the 16th decadal census overall and the eighth after Independence. It will gather detailed information at the village, town, and ward levels, covering aspects such as housing, amenities, assets, demographic profile, religion, Scheduled Castes and Scheduled Tribes, language, literacy and education, employment, migration, and fertility.
-
A new feature of this census will be the geotagging of all buildings in India, a task never undertaken on this scale before.
-
Geotagging refers to assigning latitude and longitude coordinates to a structure and placing it on a Geographic Information System (GIS) map. A GIS is a digital tool that records, checks, and displays location-specific data.
-
Latitudes (parallels) are imaginary horizontal lines that measure the north-south distance of a place from the equator, while longitudes (meridians) are vertical lines that measure the east-west distance from the Prime Meridian at Greenwich, UK. Using these, geotagging gives each building a unique and precise spatial identity.
-
In Census 2011, a ‘Census House’ was defined as a structure or part of a structure identified as a distinct unit because it has a separate entrance from a street, courtyard, or staircase. A Census House can be residential or non-residential, occupied or vacant.
-
Geotagging will be implemented in the House Listing Operations (HLO) — the first phase of Census 2027, planned between April and September 2026. The second phase, Population Enumeration (PE), will collect demographic, socio-economic, and cultural details of individuals.
-
Officials suggest that geotagging will help improve accuracy in estimating the number of Census houses and households to be enumerated, thereby making workload management for field staff more efficient.
-
Earlier censuses relied on hand-drawn sketches during the house listing stage. However, limited geotagging has already been used in government schemes such as PMAY-Gramin and PMAY-Urban, where constructed houses are geotagged for monitoring
|
Answer (d)
1. Density of population (persons per sq. km):
Now, 324 ÷ 117 ≈ 2.77 times. 2. Annual exponential growth rate:
This is an increase, but not double. |
How Majorana particles promise to shield quantum computers from noise?
For Preliminary Examination: Current events of national and international Significance
For Mains Examination: GS III - Science and Technology
Context:
In the race to make quantum computers practical, scientists have found themselves drawn to some of the strangest ideas in physics. Few are stranger — but also more promising — than the notion of using particles that are their own antiparticles to store and manipulate information. This is the concept behind Majorana particles.
Read about:
What is a Quantum Computer?
What is a Cubit?
Key takeaways:
- In the 1930s, Italian physicist Ettore Majorana proposed a particle that is unique in being identical to its own antiparticle. Unlike most matter and antimatter, which annihilate when combined, a Majorana particle is a perfect mirror of itself—reversing all charges and properties yields the same particle. Electrons and protons do not exhibit this property.
- For decades, Majoranas existed only in theory. High-energy physicists searched for them in cosmic rays and accelerators without success. More recently, condensed matter physicists discovered that certain quasiparticles in engineered materials behave mathematically like Majoranas.
- These quasiparticles are collective excitations, not fundamental particles, and can emerge in systems like superconducting nanowires cooled near absolute zero under magnetic fields.
- The discovery of Majorana-like modes in tabletop experiments sparked excitement in the quantum computing community. Their appeal lies not merely in their rarity but in their potential to address one of the field’s biggest challenges: maintaining stable quantum information
The Challenge of Qubit Stability
- Quantum computers rely on qubits, which can exist in a superposition of 0 and 1. This, combined with entanglement, gives quantum computers their power.
- However, qubits are extremely sensitive—interaction with the environment, such as stray heat or light, can collapse their superposition, erasing information.
- This phenomenon, known as decoherence, limits qubit lifetimes to microseconds or milliseconds in current superconducting chips.
- To counter this, engineers use quantum error correction, encoding one logical qubit into many physical qubits to detect and fix errors. This approach, while effective, requires hundreds or thousands of physical qubits per logical qubit, creating a scaling bottleneck
Majoranas as a Solution
- Majoranas offer a fundamentally different approach. Instead of storing a qubit in a single fragile object, the information can be shared between two spatially separated Majorana modes. In certain superconductors, electrons can form bound pairs, and under specific conditions, the quantum state of one electron can effectively split into two halves, each behaving like a Majorana mode.
- These halves can be positioned far apart within the same device, collectively defining a qubit. Any local disturbance affecting one half cannot destroy the information; both halves must be disrupted simultaneously, which is highly unlikely. This nonlocal encoding acts like splitting a secret between two locations: possessing only one part reveals nothing.
Braiding and Topological Protection
- Majorana modes are a type of non-Abelian anyon, which behave differently from ordinary quantum particles. When two identical particles like electrons or photons are swapped, their overall quantum state either changes sign (fermions) or remains unchanged (bosons).
- Non-Abelian anyons, however, undergo a fundamental transformation when exchanged, and the order of swaps matters, creating distinct final states depending on the sequence.
- This property enables topological quantum computation. By moving Majorana modes around each other—a process called braiding—one can manipulate the qubit’s state. The outcome depends only on the braid’s topology, not on the precise motion.
- This makes computations intrinsically robust against timing errors, position variations, or environmental noise, as nature effectively “rounds off” imperfections, much like a knot retains its structure regardless of twists until untied
Follow Up Question
|
Answer (B)
The term “qubit” refers to the quantum analogue of a classical bit used in quantum computing, representing a superposition of 0 and 1
A qubit (quantum bit) is the basic unit of quantum information, analogous to a classical bit in traditional computing. Unlike classical bits that can only be 0 or 1, a qubit can exist in a superposition of both 0 and 1 simultaneously
Key Properties:
|
Should water be used as a weapon?
For Preliminary Examination: Current events of antional and international Significance
For Mains Examination: GS II - International treaties
Context:
All is fair in love and war is a phrase that has literary roots and rhetorical appeal, suggesting that in matters of passion and conflict, rules can be discarded, and morality suspended. But in the realpolitik of nation-states, especially when it comes to shared natural resources, such romantic notions may be specious. Water, unlike territory or ideology, is not merely a symbol of sovereignty — it is a lifeline
Read about:
Indus Waters Treaty (IWT)
International Court of Justice (ICJ)
Key takeaways:
- The Indus Waters Treaty (IWT) was established not due to mutual goodwill, but out of pressing necessity. When British India was divided in 1947, the partition created two nations but left the water systems of the Indus basin split in a problematic way.
- The main control structures, essential for irrigation, ended up in India, while Pakistan, being downstream, depended entirely on the river flow.
- Tensions flared when India temporarily stopped water supply to Pakistan in 1948, prompting regional concerns. It was in this climate that the World Bank intervened, eventually facilitating what is now considered one of the most enduring and effective water-sharing treaties.
- Signed in 1960, the IWT assigned the eastern rivers (Ravi, Beas, and Sutlej) to India, while the western rivers (Indus, Jhelum, and Chenab) were allocated to Pakistan. India was allowed limited use of the western rivers, such as for hydropower generation, under strict design and operational rules. This division reflected both geographical realities and the larger goal of maintaining regional peace.
- The treaty has survived several major conflicts — including the wars of 1965, 1971, and 1999 — as well as periods of severe diplomatic breakdown. Its resilience lies in its technical basis and its separation from political tensions. Even during conflicts, annual meetings between the Permanent Indus Commissions were held.
- The treaty includes a structured dispute resolution process involving bilateral talks, neutral expert assessment, and, when necessary, arbitration — all of which have helped maintain its functionality despite longstanding hostility.
- In recent years, India has increasingly questioned the treaty, particularly after terror attacks such as those in Uri (2016) and Pulwama (2019), which were linked to groups operating from Pakistan. Some Indian political voices began arguing that continuing to honor the treaty was unjustifiable under such conditions, and suggested leveraging water as a strategic tool.
- This rhetoric has emerged alongside India's expanding hydropower initiatives in Jammu and Kashmir, including the Kishanganga and Ratle projects. India asserts these are in line with treaty guidelines, but Pakistan contends that certain design elements could give India undue control over water flow, particularly in dry seasons, which could impact Pakistan’s agriculture and environment.
- Pakistan has responded by invoking the treaty’s adjudication mechanisms. In the Kishanganga case, Pakistan objected to India's water diversion. The Court of Arbitration, formed in 2010, ruled in 2013 that the project could continue, provided India maintained a minimum downstream flow and abided by restrictions on reservoir operations.
- The Ratle project sparked another legal dispute. India preferred addressing the matter through a neutral expert, viewing it as a technical issue, while Pakistan insisted on arbitration
- In 2016, the World Bank — the treaty’s administrative facilitator — temporarily halted both processes to avoid simultaneous proceedings. However, by 2022, it allowed both avenues to proceed, leading India to reject the arbitration process but participate in the neutral expert mechanism.
- This development is crucial. It reaffirms that the treaty's legal framework remains robust and likely to be activated if India ever attempts to exit the agreement. Rather than strengthening India’s position, a unilateral withdrawal could invite diplomatic backlash, legal consequences, and damage to India’s global standing.
- India has consistently advocated bilateralism in resolving issues with Pakistan, especially since the Simla Agreement of 1972. However, the IWT predates this pact and explicitly includes third-party resolution mechanisms. Neutral experts and arbitrators are not outsiders but are treaty-endorsed roles agreed upon by both nations.
- India's involvement in the Kishanganga and Ratle processes — however reluctant — underscores this fact. Therefore, referencing the Simla Agreement doesn’t invalidate what the IWT permits.
- South Asia isn’t unique in facing inter-state water disputes. Post-World War I Europe saw water-related disagreements, such as between Hungary and Czechoslovakia over the Danube.
- These were largely resolved through the League of Nations. In a more recent example, the GabÄíkovo–Nagymaros dispute between Hungary and Slovakia was settled at the International Court of Justice (ICJ), which urged both sides to uphold their treaty commitments.
- The Mekong River conflict in Southeast Asia also shows that cooperation via institutions like the Mekong River Commission, with its emphasis on transparency and information-sharing, can prevent escalation.
- These cases highlight a shared lesson: unilateral actions tend to lead to deadlock or conflict, while legal and diplomatic approaches offer a path to sustainable management of disputes.
- Unilaterally exiting the IWT would likely provoke international criticism and damage India's reputation as a reliable regional leader — particularly as it seeks greater global influence.
- The World Bank, as the treaty’s facilitator, may also be compelled to step in diplomatically or even legally. Such a move could also worry neighboring countries like Nepal and Bangladesh, complicating regional water cooperation.
- Legally, the IWT is binding, with no clause for withdrawal. Under international law — specifically the Vienna Convention on the Law of Treaties — a unilateral exit is only permissible under exceptional and narrowly defined conditions.
- Moreover, water is not just a strategic resource; it is a fundamental human right. Employing it as a retaliatory tool raises serious ethical concerns. Restricting water flow could harm downstream populations during critical periods.
- Even under the banner of national security, such actions could amount to collective punishment, which breaches moral norms. India's strength lies in upholding a rules-based order, not in weaponizing essential resources.
So, what is the way forward?
India is well within its rights to maximize its usage of the IWT’s allowances, such as constructing hydropower facilities in compliance with the treaty. The Kishanganga and Ratle projects are examples, although the latter remains contested. However, abandoning the treaty would undermine India’s legal and moral high ground and could isolate it diplomatically.
The IWT remains a remarkable example of cooperation in a tense geopolitical relationship. It proves that even bitter rivals can collaborate over vital shared resources like water. Dismantling the treaty would not only reverse decades of diplomatic progress but could also set a dangerous example for managing natural resources in conflict-prone regions
Follow Up Question
1.Consider the following pairs (2019)
| Glacier | River |
| 1. Bandarpunch | Yamuna |
| 2. Bara Shigri | Chenab |
| 3. Milam | Mandakini |
| 4. Siachen | Nubra |
| 5. Zemu | Manas |
Which of the pairs given above are correctly matched?
(a) 1, 2 and 4
(b) 1, 3 and 4
(c) 2 and 5
(d) 3 and 5
|
Answer (a)
Therefore, pairs 1, 2, and 4 are correctly matched |
Why is there variation in fertility rates?
For Preliminary Examination: Total Fertility Rate (TFR) , Crude Birth Rate (CBR)
For Mains Examination: GS III - Science and Technology
Context:
The Sample Registration System (SRS) Statistical Report of 2021, released by the Office of the Registrar General of India recently, showed that India has maintained its Total Fertility Rate (TFR) at 2.0 — the same as reported in 2020. While the national average for TFR has remained the same, there is a wide regional variation in TFR data for States and Union Territories (UTs) reported independently.
Read about:
Total Fertility Rate (TFR) at 2.0
Sex Ratio at Birth
General Fertility Rate
Key takeaways:
- The Sample Registration System (SRS) Statistical Report for 2021, published by the Office of the Registrar General of India, indicates that India's Total Fertility Rate (TFR) has remained stable at 2.0, consistent with the figure reported in 2020.
- Although the national TFR has not changed, there are significant regional disparities in fertility rates across various States and Union Territories. Bihar recorded the highest TFR at 3.0, whereas West Bengal and Delhi reported the lowest at 1.4.
- Over the ten-year span from 2009-11 to 2019-21, TFR has shown a steady decline both at the national and state levels, though the pace of decline has varied.
- The SRS calculates TFR as the average number of children a woman is expected to bear during her reproductive years, defined as between ages 15 and 49. This metric is derived using age-specific fertility rates, which estimate the fertility of women within specific age groups.
- The SRS survey, which is India’s largest demographic survey, collects annual data on fertility and mortality indicators. The 2021 edition covered 8,842 sample units across all States and UTs, representing a population sample of around 84 lakh individuals.
- In addition to TFR, the report includes other fertility-related metrics such as the Crude Birth Rate (CBR), Sex Ratio at Birth, General Fertility Rate, Age-Specific Fertility Rate, and the Gross Reproduction Rate.
- The CBR measures the number of live births per 1,000 people, while the General Fertility Rate counts live births per 1,000 women of reproductive age. The Gross Reproduction Rate assesses the average number of daughters a woman is expected to have, who will themselves become mothers.
- Importantly, India’s TFR has now dropped below the replacement level of 2.1, which is the threshold needed for a generation to replace itself. In 2021, only six States had TFRs exceeding this replacement level: Bihar (3.0), Uttar Pradesh (2.7), Madhya Pradesh (2.6), Rajasthan (2.4), Jharkhand (2.3), and Chhattisgarh (2.2). All other States reported TFRs at or below 2.1.
- The report also notes that India’s Crude Birth Rate stood at 19.3 in 2021, having declined at an average annual rate of 1.12% since 2016. Most large States and UTs have shown a decreasing trend in CBR, with the exception of Uttarakhand, which recorded a slight increase. Notably, Kerala, Tamil Nadu, and Delhi have experienced the fastest rate of decline in CBR, almost double the national average
Follow Up Question
|
Answer (C)
Total Fertility Rate (TFR) represents the average number of children a woman would bear over her reproductive years (usually ages 15–49) if she experienced that year’s age‑specific fertility rates throughout her life
|
CHINA-PAKISTAN Economic Corridor (CPEC)
For Preliminary Examination: Current events of national and international significance
For Mains Examination: General Studies-II: Effect of policies and politics of developed and developing countries on India’s interests, Indian diaspora
Context:
THE CHINA-PAKISTAN Economic Corridor (CPEC) is set to be expanded to Afghanistan with the foreign ministers of the three countries agreeing on it as part of broader efforts to boost “trilateral” cooperation.
Read about:
China-Pakistan Economic Corridor (CPEC)
What is the Belt and Road Initiative?
Key takeaways:
— The China-Pakistan Economic Corridor (CPEC) forms a key component of China's broader Belt and Road Initiative (BRI).
— In 2023, China commemorated the tenth anniversary of its extensive global infrastructure strategy, the Belt and Road Initiative, originally proposed by President Xi Jinping.
— The concept of the Silk Road Economic "Belt" was introduced by President Xi during his 2013 visit to Kazakhstan. The goal was to rejuvenate historic trade and infrastructure networks connecting Asia and Europe, with a particular emphasis on routes passing through Central Asia.
— Later, Xi unveiled a complementary maritime initiative, termed the "Road," aimed at enhancing sea trade connectivity between China and regions such as Southeast Asia, Europe, and Africa. This segment has emphasized the construction of ports, bridges, industrial zones, and other infrastructure across Southeast Asia and the Indian Ocean.
— Initially known as the One Belt One Road (OBOR) initiative, the project has been more commonly referred to as the BRI since 2015.
— Since its inception, India has consistently expressed concerns over the BRI, primarily due to sovereignty issues stemming from CPEC's route through Pakistan-occupied Kashmir (PoK), as well as broader strategic concerns regarding China's activities in the Indian Ocean.
— A recent announcement on the expansion of CPEC followed a trilateral meeting in Beijing involving Chinese Foreign Minister Wang Yi, Pakistan’s Foreign Minister Ishaq Dar, and Afghanistan's Acting Foreign Minister Amir Khan Muttaqi, as per a Pakistani official statement.
— India has strongly objected to the CPEC, given its passage through PoK, and has extended this criticism to the BRI as a whole due to its inclusion of the corridor.
— The trilateral talks took place at the conclusion of Dar’s three-day trip to Beijing, marking the first high-level engagement since India launched Operation Sindoor on May 7 — a counter-terror strike in response to the deadly April 22 Pahalgam terror attack that claimed 26 lives
Follow Up Question
1.Belt and Road Initiative’ is sometimes mentioned in the news in the context of the affairs of (UPSC CSE 2016)
(a) African Union
(b) Brazil
(c) European Union
(d) China
|
Answer (d)
The Belt and Road Initiative (BRI) is a global infrastructure and economic development strategy launched by China in 2013. It aims to enhance connectivity and cooperation between China and countries across Asia, Europe, and Africa through investments in infrastructure like roads, railways, ports, and industrial parks. It is also referred to as the 21st Century Silk Road. This initiative is often in the news due to its geopolitical and economic implications |