Current Affairs Quiz - May 2025

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India recently signed agreements to supply 4.12 lakh tonnes of green hydrogen derivatives to Japan and Singapore. The Green Hydrogen Certification Scheme of India (GHCI) was launched simultaneously to ensure credible and transparent green hydrogen production. GHCI is India’s first certification framework to verify that hydrogen is produced exclusively using renewable energy. This certification ensures hydrogen is recognized as “green.” GHCI was launched by the Ministry of New and Renewable Energy (MNRE). The Bureau of Energy Efficiency (BEE) is the nodal agency for GHCI. It is supported by the National Green Hydrogen Mission.

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Under the Swachh Bharat Mission-Urban, Ghaziabad issued India’s first Certified Green Municipal Bond, raising ₹150 crore for a Tertiary Sewage Treatment Plant (TSTP). This bond marks a major shift towards sustainable urban infrastructure and financial innovation. The Tertiary Sewage Treatment Plant uses advanced Membrane Filtration Technologies like microfiltration, ultrafiltration, nanofiltration, and reverse osmosis (RO) to treat wastewater. The plant has a treatment capacity of 40 Million Litres per Day (MLD) and is linked to a 95 km pipeline network. It supplies treated water to over 1,400 industrial units, cutting dependence on freshwater sources.

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United Kingdom (UK)-based health charity Encephalitis International has launched a global campaign titled ‘Preventing Future Encephalitis: Climate Change and Infectious Disease’ to raise awareness about encephalitis and promote vaccination. Encephalitis is the inflammation of active brain tissues caused by infections or autoimmune responses, affecting over 1.5 million people globally every year. The campaign highlights how climate change increases encephalitis risk by creating conditions for disease-carrying vectors like mosquitoes and ticks to spread. India is among high-burden countries, with 1,548 cases of Japanese encephalitis reported in 2024 from 24 states and union territories.

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At the recent World Audio Visual Entertainment Summit (WAVES) in Mumbai, the Prime Minister highlighted India’s growing Orange Economy driven by content, creativity and culture. The Orange Economy, also called the creative economy, covers sectors that are based on cultural and creative ideas. As per the United Nations Economic Network, it focuses on using creative assets to boost economic growth and development. It combines economic, cultural and social factors while linking with technology, intellectual property and tourism. It includes industries based on individual talent, skill and innovation that can generate jobs, income and cultural value.

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Tunnel No. 8 (T-8) is set to become India’s longest railway tunnel at 14.57 km, overtaking Tunnel No. 50 (T-50), which is 12.77 km long on the Udhampur-Srinagar-Baramulla Railway Link. It is part of the Rishikesh–Karnaprayag Broad Gauge Rail Link Project in Uttarakhand. T-8 is a twin tunnel located on the Devprayag–Janasu stretch of this 125-km rail line. The Rishikesh–Karnaprayag Broad Gauge Rail Link Project is being implemented by Rail Vikas Nigam Limited (RVNL), a Navratna Public Sector Undertaking under the Ministry of Railways.

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The Lakkundi temples in the Gadag district of Karnataka are set to be finalized for UNESCO’s tentative listing as World Heritage Sites. Lakkundi, historically referred to as ‘Lokki Gundi’ in ancient inscriptions, was built during the reign of the Kalyana Chalukyas or Western Chalukyas. The village is home to over 50 ancient temples and 101 stepped wells, known as Kalyani. The Kasi Vishwanatha Temple is the most ornate and elaborately furnished among them. Lakkundi is also an important Jain center, with a significant Jain temple dedicated to Mahavira, which is one of the largest and oldest Jain shrines in the area.

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The International Monetary Fund (IMF) recently projected that global public debt may surpass the COVID-19 pandemic level of 98.9% of Gross Domestic Product (GDP) recorded in 2020. Sudan now has the highest debt-to-GDP ratio in the world at 252%, due to long-term conflict and economic struggles. Among developed countries, Japan ranks second with a debt-to-GDP ratio of 234.9%, mainly due to fiscal deficits and an ageing population. The United States ranks eighth with a ratio of 123%, while France and Canada follow with 116.3% and slightly lower respectively. China ranks 21st globally with a public debt ratio of 96%, which is lower than many advanced economies. India stands at 31st with a debt-to-GDP ratio of 80%, and the central government aims to reduce it to 50±1% by March 31, 2031.

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Researchers at the Indian Institute of Space Science and Technology (IIST) have developed a 3D computational model to study thermoregulation in space. It shows that microgravity consistently increases human core body temperature, which is important for long-duration space missions. Microgravity is a condition of near-weightlessness experienced when objects are in free fall around Earth, not the absence of gravity. In microgravity, normal body functions like heat regulation are altered due to changes in blood flow and metabolism. The IIST model includes sweating, shivering, clothing, and organ heat to simulate real human conditions in space.

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A recent report by the Wildlife Justice Commission (WJC) says global trafficking of pangolin scales has dropped sharply since 2020 due to COVID-19 disruptions, strong law enforcement, and changing smuggling methods. Pangolins are insect-eating mammals found in tropical forests, grasslands, and farms, often near people. There are 8 species of pangolins — 4 in Africa and 4 in Asia, including the Indian pangolin found in India, Nepal, Sri Lanka, and Bangladesh. They eat ants and termites, helping control pests and improve soil, which supports healthy ecosystems. Pangolins are hunted for their meat and scales used in traditional medicine. The Indian pangolin is listed as Endangered and the Chinese pangolin as Critically Endangered on the International Union for Conservation of Nature (IUCN) Red List.

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Recently, scientists observed repeated unrest at Campi Flegrei between 1982–1984 and 2011–2024, involving land uplift, earthquakes, and underground rumbling due to rising fluid pressure. Campi Flegrei, also called the Phlegraean Fields, is an active volcanic system located near Naples, Italy. Unlike single-cone volcanoes like Mount Vesuvius, Campi Flegrei is a large caldera, which is a sunken volcanic area formed after a huge eruption. The caldera spans about 12 to 15 kilometers and was formed by a massive eruption nearly 39,000 years ago. That eruption may have triggered climate changes that contributed to the decline of Neanderthals.