6 August 2024

• Environment: Tamil Nadu's coastline faces accelerating erosion. The state has India's second-longest coastline and 33.6 per cent of it is classified as vulnerable.
• Space: Ladakh was proposed as the site for India's first analogue research station to simulate Moon and Mars surface conditions for Gaganyaan mission preparation.
• Biodiversity: the four-ringed butterfly Ypthima cantliei was rediscovered in India after 61 years. The last confirmed sighting was in 1957 in Assam.
• AI governance: India's IndiaAI Mission and NITI Aayog's 2018 National Strategy on AI promote responsible innovation. The EU AI Act provides the most comprehensive regulatory benchmark internationally.

GS area: Geography, Environment, Disaster Management

Tamil Nadu's coastline extends for approximately 1,076 km, making it the second longest state coastline in India (after Gujarat). Coastal erosion is now acute:

• Vulnerability data: the National Coastal Climate Change Centre identifies 33.6 per cent of India's coastline as vulnerable. Tamil Nadu's exposure is above average.
• Natural causes: wave action, tidal energy, wind-driven currents and sea-level rise.
• Human causes: ports and breakwaters interrupt natural sediment transport. Desalination plants alter nearshore hydrodynamics. Groynes (walls built perpendicular to the shore to trap sand) often solve the problem in one location by accelerating erosion nearby.
• Artificial reefs: structured underwater formations that break wave energy before it hits the shore. Used as a non-structural protective measure.
• Green belts: mangrove and casuarina planting along the shoreline. Mangroves are the gold standard for coastal protection.
• CRZ Notification 2019: the Coastal Regulation Zone Notification categorises coastal zones by ecological sensitivity and restricts construction accordingly. CRZ-1 areas, which include tidal wetlands and mangroves, have the strictest restrictions.
• Geosynthetic tubes: polymer-fabric tubes filled with sand and placed on the seabed. Already used for coastal protection in Odisha.

Static linkage: coastal geography, environmental regulation, disaster management.

GS area: Science and Technology, Geography

The Indian Space Research Organisation proposed Ladakh as the location for India's first analogue research station, which would simulate conditions on the Moon and Mars:

• Analogue stations: facilities on Earth whose terrain, temperature, isolation or geomorphology resembles conditions astronauts will face in space. Existing examples include those in Devon Island (Canada) for Arctic Mars simulation and Hawaii's MDRS for volcanic terrain.
• Why Ladakh: the plateau terrain of eastern Ladakh has rocky ground, permafrost, rock glaciers and extreme temperature variation. These features geomorphologically resemble the lunar south pole and Martian terrain.
• Gaganyaan link: India's first crewed spaceflight mission, Gaganyaan, is being developed using the LVM3 rocket. An analogue station provides terrestrial training for crew operations, EVA procedures and equipment testing before actual spaceflight.
• ISRO's expansion: since Chandrayaan-3's successful lunar south pole landing in August 2023, ISRO has accelerated planning for human spaceflight and planetary exploration missions.

Static linkage: ISRO missions, Gaganyaan, Ladakh geography.

GS area: Biodiversity, Environment

The four-ringed butterfly (Ypthima cantliei) was rediscovered in India after 61 years:

• Discovery timeline: first recorded in Margherita, Assam in 1957. Believed locally extinct in India until rediscovered in 2018 at Namdapha National Park in Arunachal Pradesh. The Bombay Natural History Society confirmed the record.
• Classification: subfamily Satyrinae of family Nymphalidae. Distinctive feature: yellow-ringed eye spots on dull brown-grey wings. Common name derives from the four prominent eye spots on the hindwing.
• Namdapha: India's third-largest national park, in Arunachal Pradesh near the Myanmar border. Designated a Tiger Reserve and a Biosphere Reserve. Known for high biodiversity including the only site where all four big cats of India (tiger, leopard, snow leopard and clouded leopard) coexist.
• BNHS: the Bombay Natural History Society, founded in 1883, is India's oldest and most prominent natural history organisation. It coordinates specimen collection, field surveys and species documentation.

Static linkage: biodiversity, Northeast India ecology, protected areas.

GS area: Governance, Science and Technology, Ethics

A significant governance debate concerns whether AI needs cultural reform as much as legal regulation:

• EU AI Act: the European Union's regulation, the world's most comprehensive, classifies AI systems by risk level. High-risk systems (used in credit scoring, law enforcement, employment) face strict requirements including transparency, human oversight and data governance.
• IndiaAI Mission: India's policy framework promotes responsible AI innovation with emphasis on societal benefit. The Rs 10,372 crore Mission was approved in 2024.
• NITI Aayog's 2018 strategy: titled "AI for All," it emphasised inclusive AI development that addresses India's social challenges: agriculture, healthcare, education.
• Core critique: technical regulation (labelling, auditing, liability) is necessary but insufficient. AI systems reflect the values encoded in their training data. Biased data produces biased outcomes. Cultural change within organisations is required alongside legal frameworks.
• Accountability gap: when AI makes a consequential decision (loan denial, bail recommendation), the legal responsibility is unclear. The person, the algorithm and the deployer are all possible loci of accountability.

Static linkage: technology governance, ethics, artificial intelligence policy.

• Yen carry trade: the Bank of Japan raised interest rates to 0.25 per cent in late July 2024. This triggered an unwinding of yen carry trades: investors had borrowed yen at near-zero rates and invested in higher-yielding foreign assets. Yen appreciation of over 3 per cent against the dollar made these trades unprofitable. Global equity markets, including US tech stocks, fell sharply as funds were repatriated.
• Vampire star (WOCS 9005): a blue straggler star discovered by the Indian Institute of Astrophysics in the star cluster M67, constellation Cancer. These stars appear younger and bluer than cluster members of similar age because they have extracted ("vampired") material from a companion star. Detected via AstroSat's Ultraviolet Imaging Telescope. The companion's atmosphere is enriched with elements including barium, yttrium and lanthanum.
• Village Defence Guards: established in Jammu in the mid-1990s after the 1993 Kishtwar massacre to provide communities with self-defence capability against militant attacks. Equipped with firearms and operational across Jammu division districts.