UPSC PRELIMS 2026
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😄Danish Straits are a critical, strategic system of waterways connecting the Baltic Sea to the North Sea/Kattegat, comprising the Øresund (the Sound), the Great Belt, and the Little Belt. These passages are vital for international shipping and naval operations, serving as the main maritime gateway into the Baltic.
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Lake Ladoga is a freshwater lake located in the Republic of Karelia and Leningrad Oblast in northwestern Russia, in the vicinity of Saint Petersburg.

It is the largest lake located entirely in Europe, the second largest lake in Russia after Lake Baikal
The Baltic Sea is a semi-enclosed, shallow brackish water sea in Northern Europe, connected to the Atlantic Ocean via the Danish straits. It connects nine countries—Sweden, Denmark, Poland, Latvia, Estonia, Finland, Russia, Germany, and Lithuania—and features significant gulfs including Bothnia, Finland, and Riga.
Fecundity rate measures the potential maximum reproductive output of an organism (number of gametes or potential offspring), distinct from fertility, which is the actualized output. While human fertility rates often hover around 2.1–2.5 children per woman, maximum biological fecundity is significantly higher. It is influenced heavily by age, genetics, and health rather than cultural choices
Nord Stream 1 and 2 are twin natural gas pipelines running from Russia to Germany under the Baltic Sea, designed to supply Europe with Russian gas while bypassing traditional transit countries like Ukraine
Gas Pipeline
Trans-Mediterranean (TransMed) pipeline is fully operational, acting as a vital, long-standing energy link carrying natural gas from Algeria to Italy via Tunisia and Sicily.
Yamal Europe*
The Keystone Pipeline System is an oil pipeline system in Canada and the United States, commissioned in 2010
he GASBOL pipeline (Bolivia-Brazil Pipeline) is the longest natural gas pipeline in South America, spanning roughly 3,150 km (about 1,957 miles) from Bolivia’s Rio Grande region to Porto Alegre in southern Brazil.
The Power of Siberia 2 is a proposed natural gas pipeline to export natural gas from Russia's Western Siberia Altai region to North-Eastern China
Río de la Plata
the estuary formed by the confluence of the Uruguay River and the Paraná River at Punta Gorda. It empties into the Atlantic Ocean and forms a funnel-shaped indentation on the southeastern coastline of South America.
The Cuvette Centrale peatlands in the Congo Basin constitute the world's largest tropical peatland complex, spanning approximately \(167,600\text{ km}^2\) across the Republic of Congo and the Democratic Republic of Congo.
🐦‍🔥😎Global Peatlands Initiative GPI is multi-partner United Nations Environment Programme (UNEP) initiative launched at the Global Landscapes Forum in Marrakesh in 2016. It is effort by leading experts and institutions to save peatlands as the world’s largest terrestrial organic carbon stock and to prevent it being emitted into the atmosphere.
🦇The Global Peatlands Initiative (GPI) is a multi-partner initiative led by the United Nations Environment Programme (UNEP) that was launched at the Global Landscapes Forum during the UNFCCC COP22 in Marrakesh in November 2016
🍃Brazzaville declaration
It aims to implement coordination and cooperation between different government sectors to protect the benefits provided by peatland ecosystems. It also recognizes the importance of the scientific breakthrough of mapping the world’s largest tropical peatland area.
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The Pantanal is the world’s largest tropical wetland and flooded grassland, covering roughly 140,000 to 195,000 \(\text{km}^{2}\) primarily in Brazil, with parts in Bolivia and Paraguay. As a UNESCO World Heritage site, it acts as a, massive, biodiversity hotspot, famous for high concentrations of jaguars, caimans, and migratory birds
wetlnad usa
Pripet Marshes, vast waterlogged region of eastern Europe, among the largest wetlands of the European continent. The Pripet Marshes occupy southern Belarus and northern Ukraine.
💐Air parcels at the poles are dry due to extremely low temperatures reducing moisture-holding capacity, combined with subsiding high-pressure conditions and minimal evaporation
Rainfall. Warmer air can hold more water vapor: the theoretical maximum water vapor content is given by the Clausius–Clapeyron relation, which yields ≈7% increase in water vapor in the atmosphere per 1 °C warming.
jhelum river
Forwarded from PRELIMS 2025
The Salt Range is a mountain range in the north of Punjab province of Pakistan, deriving its name from its extensive deposits of rock salt. The range extends along the south of the Potohar Plateau and the north of the Jhelum River.
🪴Bahlul Lodi Pg.no 113 old ncert