20 August 2026

UPSC GS 1

1. Tamirabharani River

News: The Madurai Bench of the Madras High Court recently declared the Tamirabharani (Porunai) River a deity and granted it legal personhood to strengthen efforts against pollution and environmental degradation.

About Tamirabharani River:

o   River Type: Tamirabharani is a perennial river of southern India that flows entirely within the state of Tamil Nadu.

o   Origin: The river originates from the Agastyarkoodam Peak in the Pothigai Hills of the Western Ghats.

o   Course: It initially flows northward before turning eastward and traversing the districts of Tirunelveli and Thoothukudi.

o   Drainage: The river ultimately empties into the Gulf of Mannar.

o   Monsoon Support: It is one of the few rivers in Tamil Nadu that receives water from both the Southwest Monsoon and the Northeast Monsoon, ensuring perennial flow.

Major Tributaries:

o   Western Ghats Origin: Most of its tributaries arise in the forested regions of the Western Ghats.

o   Important Tributaries: The major tributaries include Servalar, Manimuthar, Gadananathi, Pachaiyar, Chittar, Ramanathi, and Koraiyar.

Waterfalls and Reservoirs:

o   Paanatheertham Falls: The river forms the scenic Paanatheertham Waterfalls, which drop from a height of about 40 metres near the Karaiyar Reservoir.

o   Other Waterfalls: It also gives rise to the Kalyanatheertham Falls and Agasthiar Falls near Papanasam.

o   Reservoir System: Several reservoirs have been constructed along the river and its tributaries to support irrigation and water supply.

Major Dams on the River:

o   Karaiyar Dam: The Karaiyar Dam is one of the important water storage structures built on the river system.

o   Manimuthar Dam: The Manimuthar Dam serves irrigation and drinking water needs in the region.

o   Gadananathi Dam: The Gadananathi Dam is constructed on one of the river’s key tributaries.

o   Ramanathi Dam: The Ramanathi Dam contributes to water management and agricultural development in the basin.

UPSC GS 2

1. National Anubhav Awards

News: The Minister of State for Personnel, Public Grievances and Pensions recently conferred the National Anubhav Awards 2026 to 15 selected awardees in New Delhi.

About National Anubhav Awards:

o   Launch: The National Anubhav Awards were launched in March 2015 by the Department of Pension & Pensioners’ Welfare (DoPPW) under the Ministry of Personnel, Public Grievances & Pensions.

o   Purpose: The awards were introduced to recognize and incentivize outstanding contributions made by retiring and retired government employees through the sharing of their experiences and suggestions.

Eligibility:

o   Eligible Employees: Employees of the Central Government, Central Public Sector Enterprises (CPSEs), and Public Sector Banks are eligible to participate.

o   Retirement Criteria: Employees who are due to retire within the next eight months or who have retired within the previous three years can submit their Anubhav write-ups.

Objectives of the National Anubhav Awards:

o   Knowledge Repository: The initiative aims to create a database of valuable work experiences and significant suggestions contributed by retiring employees.

o   Nation Building: It seeks to channel the knowledge, expertise, and experience of retiring employees towards nation-building efforts.

o   Administrative Improvement: The initiative enables Ministries and Departments to consider useful and replicable suggestions for improving governance and administration.

o   Institutional Memory: It helps preserve institutional knowledge and best practices accumulated over years of public service.

Awards and Recognition:

o   National Anubhav Award: Each awardee is felicitated with a medal, certificate, and a cash prize of ₹10,000.

o   Jury Certificate: Winners of the Jury Certificate receive a medal and certificate in recognition of their contributions.

2. Appeal and Complaint Management System (AppCoMS) Portal

News: The Central Information Commission (CIC) recently launched the upgraded Appeal and Complaint Management System (AppCoMS 2.0).

About Appeal and Complaint Management System (AppCoMS) Portal:

o   Definition: The Appeal and Complaint Management System (AppCoMS) is an online web application portal that enables citizens to file Second Appeals and Complaints digitally.

o   Launch: It was initially introduced by the Central Information Commission (CIC) in September 2016.

o   Purpose: The portal facilitates end-to-end digital processing of cases related to appeals and complaints under the Right to Information (RTI) framework.

o   Digital Case Management: It covers processes such as registration of cases, scheduling of hearings, issuance of notices, uploading of decisions and orders, and other related activities.

About AppCoMS 2.0:

o   Upgraded Platform: AppCoMS 2.0 has been developed as a technologically advanced platform with enhanced security standards, improved functionalities, and streamlined workflows.

o   User Accounts: The portal introduces dedicated user accounts for applicants, Central Public Information Officers (CPIOs), and other stakeholders, linked with their email IDs and mobile numbers.

o   Online Filing: Applicants can now submit Second Appeals and Complaints directly through their user accounts.

o   Case Tracking: Users can view case timelines, access relevant documents, and monitor the progress of their cases online.

o   Access to Orders: The platform allows applicants to download hearing notices, decisions, and orders issued by the Commission.

o   Digital Signatures: It provides the facility for using Digital Signature Certificates (DSCs) to digitally sign and issue notices and orders by the Commission.

o   Transparency and Efficiency: The upgraded system enhances transparency, accessibility, and efficiency in the handling of appeals and complaints.

UPSC GS 3

1. Lantana Camara

News: A recent study highlighted that several ornamental plants sold online in India, including Lantana camara, are alien species with invasive potential.

About Lantana Camara:

o   Plant Type: Lantana camara is a flowering shrub belonging to the Verbenaceae (verbena) family.

o   Native Origin: The species is indigenous to the tropical regions of the Americas.

o   Introduction in India: It was brought to India during the colonial period as a decorative garden plant.

Key Characteristics:

o   Climate Tolerance: The plant can thrive under diverse climatic conditions and withstand high temperatures and humidity.

o   High Adaptability: Its ability to adjust to changing environmental conditions enables it to spread rapidly across new habitats.

Invasive Nature:

o   Global Concern: Lantana camara is recognised among the world's most harmful invasive alien species.

o   Rapid Colonisation: It forms dense growths on forest floors and can quickly dominate large areas.

o   Climbing Habit: The shrub can also grow as a climber, covering trees and surrounding vegetation.

o   Threat to Native Flora: Its aggressive spread suppresses indigenous plant species and hampers natural forest regeneration.

  Impact in India:

o   Affected Region: The Nilgiri Biosphere Reserve in the Western Ghats is one of the worst-affected landscapes.

o   Ecological Consequences: Its invasion reduces biodiversity and creates challenges for ecosystem conservation and forest management.

2. Incentive Scheme for Promotion of Domestic PNG Connections

News: The Government of India has approved the Incentive Scheme for Promotion of Domestic PNG Connections to accelerate the expansion of Piped Natural Gas (PNG) connections across the country.  

About Incentive Scheme for Promotion of Domestic PNG Connections: 

o   Definition: The scheme is an incentive programme for City Gas Distribution (CGD) companies to expand household Piped Natural Gas (PNG) connections.

o   Nodal Ministry: The scheme is administered by the Ministry of Petroleum and Natural Gas.

o   Aim: It aims to encourage CGD companies to convert unbilled connections into active working connections and expand PNG networks to new areas.

o   Implementation Period: The scheme will be implemented in two tranches over a period of six months.

Key Features of the Scheme:

o   Existing Coverage: India currently has around 1.74 crore domestic PNG connections.

o   Incentive Mechanism: Eligible CGD entities will receive 200 Standard Cubic Meters (SCM) of lower-priced domestically produced natural gas for every additional billed domestic PNG connection above the prescribed threshold for their geographical area.

o   Promotion of Active Connections: The incentive is linked to the creation of additional billed and functional PNG connections, encouraging effective utilisation of existing infrastructure.

o   Cost Reduction: The additional domestic gas allocation will substitute the costlier Liquefied Natural Gas (LNG) used by CGD entities in their Compressed Natural Gas (CNG) transport segment.

o   Lower Gas-Sourcing Costs: By replacing expensive LNG with domestically produced gas, the scheme will reduce the overall gas procurement cost of CGD companies.

o   Expansion of PNG Network: The scheme is expected to promote wider adoption of PNG and strengthen the reach of the City Gas Distribution network across the country.

3. Helicase

News: A recent study has explained how cells use a molecular safety mechanism to ensure that DNA replication begins at the correct time.

About Helicase:          

o   Definition: Helicase is a specialized enzyme and motor protein that unwinds the double-stranded DNA molecule into two separate single strands.

o   Biological Importance: It is indispensable for key cellular processes such as DNA replication, DNA repair, and gene transcription.

Functions of Helicase:

o   DNA Replication: Helicase separates the two strands of DNA, allowing the cell to accurately copy genetic information before cell division.

o   Access to Genetic Information: By opening the DNA double helix, it makes the genetic code accessible for various cellular activities.

o   DNA Repair: Helicase helps expose damaged sections of DNA so that repair mechanisms can identify and correct errors.

o   Gene Expression: It assists in transcription by unwinding DNA, enabling the synthesis of RNA from genetic templates.

Working Mechanism of Helicase:

o   Energy Utilisation: Helicase derives energy by breaking down Adenosine Triphosphate (ATP) and converts this chemical energy into mechanical movement.

o   DNA Unwinding: As it travels along the DNA molecule, helicase breaks the hydrogen bonds that hold the complementary DNA strands together.

o   Replication Fork Formation: The separation of DNA strands creates a characteristic Y-shaped replication fork, which serves as the site for DNA copying.

o   Strand Exposure: The unwound DNA strands become exposed and available as templates for the synthesis of new strands.

o   Role of Topoisomerases: The unwinding process generates twisting stress ahead of the replication fork, which is relieved by topoisomerase enzymes, preventing DNA damage and entanglement.

o   Template for New DNA: Once the strands are separated, the replication machinery uses each original strand as a template to produce a complementary DNA strand.

4. Kikuchi-Fujimoto Disease (KFD)

News: A man from Visakhapatnam was recently diagnosed with rare Kikuchi-Fujimoto Disease (KFD).

About Kikuchi-Fujimoto Disease:

o   Definition: Kikuchi-Fujimoto Disease (KFD), also known as Histiocytic Necrotizing Lymphadenopathy, is a rare inflammatory condition that primarily affects the lymph nodes.

o   Nature of Disease: The disorder is generally benign and self-limiting, meaning it often resolves without causing long-term complications.

o   Age Group Affected: It most commonly affects young adults, particularly those below 30 years of age.

o   Diagnostic Challenge: The disease can closely resemble conditions such as tuberculosis and lymphoma, making diagnosis difficult.

Causes of Kikuchi-Fujimoto Disease:

o   Uncertain Origin: The exact cause of KFD has not yet been established.

o   Possible Viral Trigger: Researchers believe certain viral infections may trigger the disease in susceptible individuals.

o   Autoimmune Link: Some studies suggest that abnormal immune responses or autoimmune mechanisms may also play a role in its development.

Symptoms of Kikuchi-Fujimoto Disease:

o   Lymph Node Enlargement: Patients typically develop swollen and painful lymph nodes, especially on one side of the neck.

o   Fever: A persistent low-grade fever is commonly reported.

o   Fatigue: Many patients experience significant tiredness and weakness.

o   Headache: Recurrent headaches may occur during the course of the illness.

o   Respiratory Symptoms: Some individuals may develop a sore throat or cough.

o   Skin Manifestations: Skin rashes can appear in certain cases.

o   Digestive Symptoms: Nausea and vomiting may accompany the disease.

o   Night Sweats: Excessive sweating during sleep is another reported symptom.

o   Weight Loss: Unexplained weight loss can occur in some patients.

Complications:

o   Generally Mild Course: Most cases improve spontaneously without serious health consequences.

o   Association with Autoimmune Disorders: In a small number of patients, KFD may occur alongside autoimmune diseases in which the immune system attacks the body's own tissues.

Treatment of Kikuchi-Fujimoto Disease:

o   No Specific Cure: There is currently no definitive cure for KFD.

o   Symptomatic Management: Treatment mainly focuses on relieving symptoms and improving patient comfort.

o   Use of NSAIDs: Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) are commonly prescribed to reduce fever, pain, and headaches.

o   Corticosteroid Therapy: In severe or persistent cases, corticosteroids may be used to reduce inflammation and lymph node swelling. 

5. Escherichia Coli (E. coli)

News: A recent Comptroller and Auditor General (CAG) report on railway station facilities revealed the presence of E. coli bacteria in drinking water samples.

About Escherichia coli (E. coli):

o   Definition: Escherichia coli, commonly known as E. coli, is a bacterium that naturally inhabits the intestines of humans and animals.

o   Classification: It is a rod-shaped bacterium belonging to the Enterobacteriaceae family.

o   Natural Presence: Most strains of E. coli form a normal part of the intestinal microbiota and contribute to digestive health.

o   Disease-Causing Strains: While many strains are harmless, certain varieties can cause serious infections and illnesses.

Transmission of E. coli:

o   Contaminated Water: The bacteria can spread through consumption of water contaminated with human or animal waste.

o   Contaminated Food: Infection may occur through improperly cooked food or food contaminated during handling and processing.

o   Fecal-Oral Route: Direct or indirect contact with infected fecal matter can also transmit the bacterium.

Health Impacts of E. coli:

o   Gastrointestinal Illness: Certain strains can cause diarrhoeal diseases ranging from mild to severe.

o   Urinary Tract Infections: E. coli is one of the most common causes of urinary tract infections (UTIs).

o   Respiratory and Other Infections: Some strains may lead to respiratory illnesses, pneumonia, and other infections.

o   Toxin Production: The most harmful strains produce Shiga toxin, which damages the lining of the small intestine and causes severe intestinal illness.

o   STEC Strains: These disease-causing variants are known as Shiga Toxin-Producing Escherichia coli (STEC).

Symptoms of E. coli Infection:

o   Diarrhoea: Persistent diarrhoea is one of the most common symptoms.

o   Bloody Diarrhoea: Severe infections may result in blood-stained stools.

o   Fever: Patients often experience mild to moderate fever.

o   Vomiting: Nausea and vomiting may accompany gastrointestinal symptoms.

o   Abdominal Discomfort: Stomach cramps and abdominal pain are frequently reported.

Treatment and Prevention:

o   Self-Limiting Nature: Most E. coli infections resolve on their own without requiring specific medical treatment.

o   Hydration: Maintaining adequate fluid intake is crucial to prevent dehydration during illness.

o   Safe Water and Food: Proper sanitation, safe drinking water, and hygienic food handling practices are essential for preventing infection.

o   Public Health Indicator: The presence of E. coli in drinking water is widely used as an indicator of fecal contamination and poor water quality.