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October 6th Current Affairs

Home / UPSC / Current affairs / UPSC Current Affairs – October 6th

Table of Contents

Medicine Nobel 2026 — Optogenetics and the Control of Brain Cells with Light

Why in News?

The 2026 Nobel Prize in Physiology or Medicine has been awarded jointly to Karl Deisseroth, Peter Hegemann and Georg Nagel for their discoveries concerning light-gated ion channels and optogenetics. The announcement was made by the Nobel Assembly at Karolinska Institutet on 5 October 2026.

What is Optogenetics?

Optogenetics is a technique that combines genetics + light to control the activity of specific nerve cells (neurons).

In simple terms:

Genetic modification → Light-sensitive protein in neuron → Light stimulation → Neuron turns ON/OFF

It allows scientists to control individual types of neurons with very high precision, helping them understand how the brain produces memory, emotions, behaviour and cognition.

How does it work?

  1. Scientists introduce a gene that produces a light-sensitive protein into selected neurons.
  2. One important protein discovered in this research is channelrhodopsin.
  3. Channelrhodopsin functions as a light-gated ion channel.
  4. When exposed to specific light, the channel opens and allows ions to move across the cell membrane.
  5. This changes the electrical state of the neuron and can make it fire or become inactive.
  6. Researchers can therefore study the precise relationship between particular neurons and specific behaviours.

 

What are Light-Gated Ion Channels?

These are proteins present in cell membranes whose activity can be controlled by light.

Think of them as tiny doors in the cell membrane:

Light → Channel opens → Ions flow → Electrical activity changes

This is important because neurons communicate through electrical signals and ion movement.

The laureates’ discovery provided the molecular tools needed to control neuronal activity using light.

Contribution of the Nobel Laureates

Peter Hegemann

  • German neuroscientist.
  • Worked on light-sensitive proteins found in microorganisms.
  • His research helped identify the light-sensitive mechanisms that later became central to optogenetics.

Georg Nagel

  • German scientist.
  • Worked with Hegemann on channelrhodopsins, light-sensitive proteins found in algae.
  • Their work demonstrated that these proteins could function as light-controlled ion channels.

Karl Deisseroth

    • American neuroscientist and psychiatrist at Stanford University.
    • Helped transform these discoveries into a practical technique for controlling neurons in living brains.
    • His work established optogenetics as a major tool in modern neuroscience.

Why is this discovery important?

Before optogenetics, scientists could observe brain activity, but it was difficult to establish whether a specific group of neurons actually caused a particular behaviour.

Optogenetics changed this by allowing researchers to activate or inhibit selected neurons with light.

It has therefore helped scientists investigate:

  • Memory formation
  • Emotions and behaviour
  • Brain circuits
  • Neural disorders
  • Cognition
  • Neuropsychiatric diseases

The technique has also opened possibilities for therapeutic applications, including research into Parkinson’s disease, epilepsy, Alzheimer’s disease and restoration of vision.

UPSC Relevance

Remember the following associations:

Concept

Key Point

Optogenetics

Controls specific cells using light

Channelrhodopsin

Light-sensitive protein

Light-gated ion channels

Ion channels controlled by light

Neurons

Fundamental cells of the nervous system

2026 Medicine Nobel

Deisseroth, Hegemann & Nagel

Major field

Neuroscience

The Looming Crisis of World Unemployment

Why in News?

A widening global jobs gap is threatening the ability of developing countries to convert their large young populations into a demographic dividend. A World Bank forecast highlighted that around 1.2 billion young people in the Global South are expected to enter working age over the coming decade, while the global economy may generate only about 400 million viable jobs. This could leave a potential gap of nearly 800 million jobs.

The concern is not simply the number of unemployed people. The larger problem is whether economies can create productive, decent and adequately paid employment for their growing working-age populations.

What is the Demographic Dividend?

Demographic dividend refers to the economic growth potential that can arise when the proportion of the working-age population becomes larger than the dependent population.

Simple example:

More working people → More employment → Higher income → Higher savings & investment → Higher economic growth

But this chain works only when the economy is capable of providing productive jobs.

Therefore:

A young population is an opportunity only when it can be productively employed.

If jobs are not created, the same demographic structure can become a demographic burden.

Why is the Old Model of Job Creation Under Pressure?

Earlier, many developing economies followed a relatively simple path:

Agriculture → Labour-intensive manufacturing → Urbanisation → Higher productivity → Better incomes

This was an important part of the East Asian economic transformation.

However, this pathway has become more difficult for today’s developing countries.

  1. Automation and technology

Factories increasingly use:

  • Robotics
  • Artificial Intelligence
  • Industrial software
  • Automated production systems

This increases productivity but can reduce the number of workers required for certain manufacturing activities.

  1. Premature deindustrialisation

Many developing countries are experiencing a decline in the importance of manufacturing before reaching the income levels at which today’s developed countries industrialised.

This is known as premature deindustrialisation.

  1. Capital-intensive growth

Investment is increasingly flowing into sectors that require large amounts of capital but may not generate employment at the same scale.

Therefore:

GDP growth ≠ proportional employment growth

Why is the Global South Particularly Vulnerable?

The Global South contains a large share of the world’s young and growing populations.

Countries in:

  • South Asia
  • Sub-Saharan Africa
  • Parts of Southeast Asia
  • Other developing regions

will add large numbers of young workers to their labour markets.

If employment opportunities do not expand simultaneously, countries could face:

Youth unemployment → Underemployment → Informality → Lower incomes → Social dissatisfaction

The ILO’s 2026 assessment similarly shows that global headline unemployment can remain relatively stable while job quality, youth employment and access to decent work remain major concerns. The global unemployment rate is projected at 4.9% in 2026, but the broader global jobs gap is much larger—about 408 million people who want paid work but cannot access it.

Youth Unemployment: A Major Concern

The problem is particularly severe among young people.

According to the ILO’s Global Employment Trends for Youth 2026, global youth unemployment reached 12.4% in 2025, representing about 67 million young people aged 15–24.

Around 20% of young people were also classified as NEET—Not in Employment, Education or Training—equivalent to more than 257 million people.

Why youth unemployment is dangerous?

Young people unable to find productive employment may experience:

  • Loss of income
  • Skill deterioration
  • Social exclusion
  • Delayed family formation
  • Migration pressures
  • Political dissatisfaction
  • Greater vulnerability to extremism and social unrest

Thus, employment is not merely an economic issue; it is also a social and political stability issue.

What about India?

India is particularly important in this debate because it has a large young population and therefore a significant demographic opportunity.

But India faces several employment challenges:

  1. Skill–job mismatch

The skills possessed by young people do not always match the requirements of employers.

  1. Informal employment

A large proportion of workers remain in informal employment, often without:

  • Social security
  • Stable wages
  • Employment protection
  • Adequate working conditions
  1. Low female labour-force participation

India is not fully utilising its potential workforce because many women remain outside paid employment.

Increasing women’s participation can significantly improve household incomes and overall economic productivity.

  1. Agriculture as a labour absorber

Agriculture continues to absorb a large workforce despite relatively low productivity.

The challenge is to move workers towards higher-productivity manufacturing and services without creating distress migration.

  1. AI and services

Artificial intelligence could affect some entry-level and routine service-sector jobs, making skill upgrading increasingly important.

Which Sectors Can Create Jobs?

The article highlights the need to look beyond the traditional factory-led model.

  1. Labour-intensive manufacturing
  • Textiles
  • Footwear
  • Food processing
  • Electronics
  • Light manufacturing
  1. Care economy
  • Nursing
  • Elder care
  • Childcare
  • Community health services

This sector has significant potential for women’s employment.

  1. Tourism

Tourism remains relatively labour-intensive and can generate employment across skill levels.

  1. Agri-tech and food processing

Developing:

Agriculture → Storage → Cold chain → Processing → Marketing

can create employment throughout the agricultural value chain.

  1. Green economy

Renewable energy, electric mobility and related manufacturing can become new sources of employment if accompanied by appropriate skilling.

What Should Governments Do?

Job-rich growth

Economic policies should focus not only on GDP growth but also on employment elasticity of growth.

Support MSMEs

Small and medium enterprises are major potential sources of employment. Governments need to reduce:

  • Regulatory barriers
  • Cost of credit
  • Compliance burden
  • Uncertainty for businesses

Improve skilling

Skill development should be linked directly to industry demand, rather than focusing only on enrolment numbers.

Promote women’s employment

Important measures include:

  • Affordable childcare
  • Safe public transport
  • Workplace safety
  • Flexible work arrangements
  • Better access to skills and finance

International cooperation

Developing countries require access to:

  • Affordable long-term finance
  • Technology
  • Investment
  • Global markets

Developed countries and multilateral institutions can play an important role in facilitating this transition.

India’s Bid to Host the 2036 Olympic Games

Why in News?

India is actively pursuing its bid to host the 2036 Olympic and Paralympic Games, with Ahmedabad, Gujarat at the centre of the proposed bid. India is currently in the “Continuous Dialogue” stage of the International Olympic Committee’s host-selection process.

The IOC’s revised process is expected to identify shortlisted candidates in 2027, with the final host expected to be elected in 2029. Thus, India’s immediate task is to demonstrate that it has the required infrastructure, governance, financing and organisational capacity.

India's 2036 Olympic Bid

The Indian Olympic Association (IOA) is responsible for India’s Olympic bid. It submitted a Letter of Intent to the IOC in October 2024, formally beginning the process.

The proposed host city is Ahmedabad, with venues and infrastructure planned across Ahmedabad and Gandhinagar.

Important point

India has NOT yet been awarded the 2036 Olympics.

It is currently a bidder/candidate going through the IOC’s selection process.

IOC Host Selection Process

The selection of an Olympic host follows a multi-stage process.

Expression/Letter of Intent

⬇️

Continuous Dialogue

⬇️

Strategic/Targeted Dialogue

⬇️

Detailed evaluation of the bid

⬇️

IOC decision/election

The revised IOC roadmap provides for a shortlist in 2027, followed by deeper evaluation of candidates, with the host election expected in 2029.

What does the IOC evaluate?

Among other things:

  • Sports infrastructure
  • Transport connectivity
  • Accommodation
  • Financial sustainability
  • Governance
  • Security
  • Environmental sustainability
  • Anti-doping measures
  • Ability to organise the Games
  • Long-term legacy for the host city and country

Why Ahmedabad?

Ahmedabad has emerged as the centrepiece of India’s proposed Olympic plan.

The city is already preparing for the 2030 Commonwealth Games, which will provide India with an opportunity to demonstrate its capacity to organise a major multi-sport event before the Olympic bid is decided.

A proposed Sardar Vallabhbhai Patel Sports Enclave in Ahmedabad is intended to provide Olympic-standard sporting infrastructure. Earlier plans envisaged multiple sporting venues and the use of the existing Narendra Modi Stadium.

Why does India want to host the Olympics?

  1. Global sporting stature

Hosting the Olympics would significantly increase India’s visibility in the international sporting system.

India wants to move from being primarily associated with cricket to becoming a major multi-sport nation.

  1. Sports infrastructure

The Olympics can accelerate investment in:

  • Stadiums
  • Training facilities
  • Sports science
  • Athlete accommodation
  • Transport
  • Urban infrastructure
  1. Grassroots sports development

A successful bid can encourage greater participation in sports among young people and help create a grassroots-to-elite sports pipeline.

  1. Economic benefits

Large sporting events can stimulate:

  • Tourism
  • Construction
  • Hospitality
  • Transport
  • Employment
  • Local businesses

However, these benefits depend on financially sustainable planning and effective post-event utilisation of infrastructure.

  1. International image

The Olympics provide a platform for a country to showcase its:

  • Infrastructure
  • Culture
  • Technological capabilities
  • Organisational capacity

India has therefore linked the 2036 ambition with its broader objective of becoming a major global economic and strategic power.

Major Challenges for India

Winning the bid is not simply about building stadiums.

  1. Sports governance

The IOC has raised concerns relating to governance in India’s sports ecosystem. India has been working on reforms aimed at improving transparency and governance of sports bodies.

  1. Anti-doping

Effective implementation of anti-doping measures is important for India’s Olympic credibility.

  1. Olympic performance

India also needs to improve its performance across Olympic disciplines.

A successful host bid should ideally be accompanied by a stronger athlete-development ecosystem.

  1. Financial sustainability

The Olympics are extremely expensive to organise.

India must avoid creating under-utilised or “white elephant” infrastructure after the Games.

  1. Environmental sustainability

Large sporting events can create:

  • Construction-related emissions
  • Waste
  • Pressure on water resources
  • Traffic congestion
  • Ecological stress

Therefore, India needs a sustainable and legacy-oriented Olympic model.

2030 Commonwealth Games: Important Link

Ahmedabad is also scheduled to host the 2030 Commonwealth Games.

This is strategically important because hosting the Commonwealth Games can act as a testing ground for India’s:

  • Infrastructure
  • Logistics
  • Transport
  • Security
  • Volunteer management
  • Event organisation

India is also seeking to host the 2038 Asian Games in Ahmedabad, further strengthening its ambition to become a major international sporting destination.

Great Indian Bustard: India’s Conservation Challenge

Why in News?

The Great Indian Bustard (GIB) has again come into focus following recent conservation efforts in Rajasthan. The species is among India’s most threatened birds, with fewer than 150 individuals remaining in the wild, largely confined to parts of Rajasthan and Kutch in Gujarat.

Recent conservation work includes captive breeding, rewilding and release of captive-bred birds into suitable habitats. The objective is to rebuild a viable wild population and eventually restore the species across parts of its historical range.

What is the Great Indian Bustard?

The Great Indian Bustard, scientifically known as Ardeotis nigriceps, is a large terrestrial bird associated mainly with open grasslands and semi-arid ecosystems.

It is:

  • Critically Endangered on the IUCN Red List.
  • Listed under Schedule I of India’s Wild Life (Protection) Act.
  • A largely resident species.
  • Particularly associated with the grassland and desert ecosystems of Rajasthan and Gujarat.

The species was once distributed much more widely, from Punjab in the north to Tamil Nadu in the south, but its range has drastically contracted. Its remaining populations are concentrated mainly in Rajasthan and Gujarat.

Why is the Great Indian Bustard Declining?

  1. Collision with power lines

This is one of the most important threats.

The GIB has poor frontal vision and is a heavy bird with limited manoeuvrability. It can therefore collide with overhead transmission lines.

The Supreme Court has noted that high-voltage lines can cause fatal collisions, while lower-voltage lines can also cause electrocution.

This problem is particularly significant because large solar and wind-energy projects in western Rajasthan and Gujarat require extensive power-transmission infrastructure.

  1. Habitat loss

Conversion and degradation of grasslands and open natural ecosystems have substantially reduced suitable habitat.

The species’ habitat has shrunk dramatically compared with the 1960s.

  1. Agricultural expansion

Conversion of grasslands into agricultural land reduces feeding and breeding areas.

  1. Hunting and disturbance

Historically, hunting was a major factor in the species’ decline. Human disturbance and increasing infrastructure continue to put pressure on remaining populations.

  1. Slow reproduction

The GIB has a low reproductive rate, which makes population recovery particularly difficult. Even a small number of deaths can have a significant impact on the population.

The Great Indian Bustard vs Renewable Energy

This is one of the most important UPSC dimensions of the issue.

Western Rajasthan and Gujarat have enormous potential for:

☀️ Solar energy

🌬️ Wind energy

At the same time, these regions contain some of the GIB’s last remaining habitats.

Therefore, there is a potential conflict:

Renewable-energy expansion
⬇️
Transmission infrastructure
⬇️
Power lines through GIB habitat
⬇️
Bird collisions and mortality

The challenge is to achieve both:

Biodiversity conservation + Clean-energy transition

The Supreme Court has recognised the need to balance GIB conservation with India’s renewable-energy commitments rather than imposing a blanket prohibition on all transmission lines.

Conservation Efforts

  1. Captive breeding

India has established a Great Indian Bustard Conservation Breeding Centre at Ramdevra, Rajasthan.

Captive breeding aims to:

  • Increase the number of birds.
  • Maintain genetic diversity.
  • Produce birds for eventual release into the wild.
  1. Rewilding

Captive-bred birds are being gradually trained to survive independently.

Training includes exposure to:

  • Natural sunlight
  • Temperature variations
  • Natural airflow
  • Natural food/prey
  • Water-finding and feeding behaviour

This is important because raising a bird in captivity does not automatically mean it can survive in the wild.

  1. Artificial insemination

Artificial insemination is being explored as an additional reproductive tool to improve breeding and help manage the genetic diversity of the extremely small wild population.

  1. Power-line mitigation

Possible measures include:

  • Undergrounding power lines in critical stretches.
  • Installing bird diverters/visibility markers on overhead lines.
  • Careful routing of future transmission infrastructure away from priority habitats.

The Supreme Court has specifically considered measures such as underground lines in priority areas and diverters in potential habitats.

Important Supreme Court Dimension

The case M.K. Ranjitsinh v. Union of India is highly relevant for UPSC.

The case concerns the conflict between:

GIB conservation
vs
Transmission infrastructure for renewable energy

The Supreme Court has emphasised the need for a science-based and balanced approach, recognising both biodiversity conservation and India’s need to expand renewable energy.

Why is GIB an Important Indicator?

The GIB is closely associated with open natural ecosystems, particularly grasslands and semi-arid landscapes.

Its decline highlights a larger problem:

Grasslands are often mistakenly treated as wastelands rather than valuable ecosystems.

These ecosystems support:

  • Biodiversity
  • Livestock
  • Pollinators
  • Soil conservation
  • Carbon storage
  • Local livelihoods

Therefore, conserving the GIB also requires protecting its grassland ecosystem.

Coal Stocks Critically Low as Power Demand Rises

Why in News?

India is facing critically low coal stocks at a large number of thermal power plants amid a sharp rise in electricity demand.

According to Central Electricity Authority (CEA) data as of September 30, 2026, 84 out of 191 thermal power plants had critically low coal stocks—more than 44% of the plants monitored. At the same time, the Union Coal and Mines Minister maintained that there is no structural coal shortage, attributing the situation mainly to the surge in power demand.

What does “Critically Low Coal Stock” mean?

The CEA considers a thermal power plant’s coal stock to be critical when:

  • its stock falls below 25% of the normative requirement, or
  • the available coal is sufficient for less than three days of generation.

In simple words:

Normative coal stock = required buffer stock

If the plant has:

Less than 25% of required stock OR less than 3 days’ supply → Critical

This is important because a plant can face generation constraints even when the country as a whole has adequate coal production.

Why are Coal Stocks Falling?

    1. Rapid increase in electricity demand

    India’s power demand increased by around 10% in 2026, the fastest year-on-year increase in about a decade.

    India recorded a record peak power demand of approximately 270.8 GW on May 21, 2026.

    Higher demand means:

    Higher electricity generation → More coal consumption → Faster depletion of stocks

    1. Higher temperatures and cooling demand

    Rising temperatures have increased the use of:

    • Air conditioners
    • Fans
    • Refrigeration
    • Industrial cooling systems

    India experienced an exceptionally hot August 2026, contributing to higher electricity consumption.

    This demonstrates an important climate-energy linkage:

    Higher temperature → Higher cooling demand → Higher electricity demand → Greater coal consumption

    1. El Niño and lower hydropower generation

    The El Niño phenomenon can weaken the Indian monsoon.

    Reduced rainfall can lead to:

    Lower reservoir levels → Lower hydropower generation → Greater dependence on thermal power → Higher coal consumption

    Thus, the present coal-stock issue is also linked to climate variability.

    Recent reporting shows that reduced hydropower output has increased India’s reliance on coal-based generation.

    1. Logistics and transportation constraints

    Coal has to move through a large supply chain:

    Coal mine → Rail/Road → Power plant → Thermal generation

    Even when coal is available at mines, inadequate transportation capacity can prevent timely delivery to power plants.

    This creates an important distinction:

    Coal production ≠ Coal availability at the power plant

    India has previously increased railway rakes and other transport arrangements to improve coal movement to thermal plants.

Is India facing a Coal Shortage?

The government has argued that the present problem is primarily a surge in power demand and stock management, rather than an absolute shortage of coal in the country.

Therefore, we should distinguish between:

Coal shortage

Insufficient overall coal supply.

Coal-stock shortage

Insufficient coal available at a particular power plant at a particular time.

A plant may have critically low stocks because of:

  • sudden demand increase,
  • transportation bottlenecks,
  • weather disruptions,
  • inadequate advance stocking,
  • increased dependence on thermal generation.

Why is this Important for India's Energy Security?

Coal remains extremely important to India’s electricity system.

According to Energy Statistics India 2026, coal accounted for about 79% of total energy generated in 2024–25.

Therefore:

Low coal stocks → Lower thermal generation capacity → Risk of power shortages

This becomes particularly significant because renewable energy cannot yet completely replace coal for round-the-clock electricity supply, especially when:

  • solar generation falls at night,
  • hydropower output is weak,
  • battery storage remains insufficient.

Recent power shortages have highlighted this challenge.

The Renewable Energy Paradox

This issue highlights an important transition challenge for India.

India is rapidly expanding:

☀️ Solar energy
🌬️ Wind energy
💧 Hydropower

Yet coal remains the major firm/balancing source of electricity.

Why?

Solar power is abundant during the daytime but falls after sunset.

Therefore:

Daytime solar surplus → Need for storage → Night-time demand → Thermal power remains important

The present situation shows that India’s energy transition requires not only more renewable capacity but also:

  • Battery storage
  • Pumped-storage hydropower
  • Strong transmission networks
  • Better demand forecasting
  • Flexible thermal generation

Government Response

The government is attempting to ensure adequate power availability by improving:

Coal supply

Increase domestic coal production and dispatch.

Rail logistics

Ensure sufficient railway rakes for transportation.

Thermal generation

Keep available thermal plants operational.

Captive power plants

The government has directed 112 captive coal-based power plants to operate at full capacity from October 1 to December 31, 2026, under emergency provisions.

Renewable + Storage

Greater integration of battery storage can help shift daytime renewable electricity to periods of peak/night-time demand.

Bigger Issue: Climate Change and Energy Security

This news demonstrates how climate variability can affect energy security.

The chain is:

El Niño
↓
Monsoon variability
↓
Lower hydropower generation
↓
Greater dependence on coal
↓
Higher coal consumption
↓
Lower coal stocks
↓
Risk to electricity supply

At the same time:

Higher temperatures
↓
Higher cooling demand
↓
Higher electricity demand

Thus, climate change can affect India’s energy system from both the supply and demand sides.

 

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