Climate Change & Conventions

Cement manufacturing contributes significantly to global carbon emissions, mainly due to the chemical process involved in producing clinker. ✅ Statement I: Cement industry emissions are estimated to be around 5-8% of global CO₂ emissions, making it a major source of greenhouse gases. ✅Statement II: Silica-bearing clay is indeed mixed with limestone during cement making to provide essential minerals like silicon, aluminum, and iron needed for the final product. ✅Statement III: During clinker production, limestone (calcium carbonate) is heated and converted into lime (calcium oxide), releasing CO₂ in the process. This calcination is the main source of carbon emissions in cement manufacturing. Both Statements II and III are correct, but only Statement III directly explains the source of carbon emissions mentioned in Statement I.

Direct Air Capture (DAC) is a technology that removes CO₂ directly from the air for storage or use in various industries. ✅ Statement I is correct:
* DAC captures CO₂ for carbon sequestration, reducing greenhouse gases. ✅ Statement II is correct:
* Captured CO₂ can be used to make plastics and in food processing. ✅ Statement III is correct:
* DAC provides carbon to make synthetic low-carbon aviation fuels by combining with hydrogen. So, the correct answer is: C

Article 6 of the Paris Agreement is crucial as it outlines international cooperation through both carbon markets and non-market approaches to help countries meet climate goals. ✅ Statement I is correct:
* Article 6 is widely discussed because it enables cooperation through market and non-market means to fight climate change. ✅ Statement II is correct:
* It defines rules for carbon markets, including carbon trading and credit mechanisms. ✅ Statement III is correct:
* It also promotes non-market tools like technology transfer and capacity building to reach climate targets. So, the correct answer is: A

Statement I is correct: Without the atmosphere to trap heat, the Earth’s surface temperature would drop to well below freezing, making it too cold to support life as we know it.
In statement 1 though it's an extreme statement but from UPSC CSE point of view it's generally considered true. Statement II is correct: The atmosphere absorbs and retains heat (a natural greenhouse effect), which helps maintain the Earth’s average temperature within a habitable range. Statement III is correct: Gases such as carbon dioxide, methane, and water vapor are particularly effective at absorbing and trapping infrared radiation, helping to warm the planet.

Earth’s rotation and axis can shift due to changes in how mass is distributed across the planet, such as melting polar ice. ✅Statement I is correct: * Studies show that Earth’s rotation and axis are shifting slightly due to internal mass redistribution. ✅ Statement II is correct: * But it doesn’t explain the shift — solar flares affect only the upper atmosphere, not Earth’s rotation. ✅ Statement III is correct: * It explains the shift — melting polar ice moves water toward the equator, altering Earth’s mass distribution and spin.

Congo Basin Peatlands: The Congo Basin in Central Africa is home to the world's largest tropical peatland complex. This vast peatland stores an immense amount of carbon, estimated to be equivalent to about three years of global fossil fuel emissions.  Importance of Peatlands: Peatlands are a critical carbon sink. They store more carbon than all the world's forests combined. When peatlands are drained or degraded, this stored carbon is released into the atmosphere, contributing to climate change. The Republic of Congo, the Democratic Republic of Cong and Indonesia are parties to the Brazzaville Declaration, aimed at protecting the Cuvette Centrale region in the Congo Basin, the world’s largest tropical peatlands, from unregulated land use and preventing its drainage and degradation.  _Other Options:_  * Amazon Basin: While the Amazon is known for its vast rainforests, it is not the primary location of the world's largest tropical peatland. * Kikori Basin: The Kikori Basin is located in Papua New Guinea and contains significant peatlands, but not the largest tropical peatland complex. * Rio de la Plata Basin: This basin in South America is primarily known for its grasslands and is not associated with major peatland areas.

Statement 1 is incorrect. Insolation reaches the earth's surface in short waves and heat is radiated from the earth in long waves, Hence energy leaving the earth's surface i.e. terrestrial radiation heats up the atmosphere more than the incoming solar radiation i.e. insolation. Statement 2 is correct. Greenhouse gases in the atmosphere (such as water vapour and carbon dioxide) absorb most of the Earth's emitted longwave infrared radiation, which heats the lower atmosphere.

* Statement-I: Correct. The European Parliament indeed approved the Net-Zero Industry Act in March 2023. This act aims to scale up manufacturing of clean technologies within the EU. * Statement-II: Incorrect. The EU's target for achieving carbon neutrality is 2050, not 2040. Additionally, while the EU aims to bolster its own clean technology production, it doesn't necessarily aim to develop all of its own technology by 2050. Collaboration and some level of imports are likely to remain part of the strategy. Therefore, the correct option is (C): Statement-I is correct, but Statement-II is incorrect.

100 Million Farmers: The 100 Million Farmers initiative, launched by The World Economic Forum (WEF), seeks to drive a global movement focused on accelerating the adoption of regenerative agriculture and climate adaptation practices at the farm level. This initiative aims to transition towards sustainable food and water systems. It focuses on achieving net-zero carbon emissions, enhancing nature positivity, and improving farmers' resilience to climate change and market fluctuations. _Let's look at why the other options are incorrect:_ *  Option B: This describes organizations promoting organic animal husbandry, not the '100 Million Farmers' initiative. *  Option C: This refers to a blockchain-based platform for fertilizer trading, which is not the core focus of '100 Million Farmers.' *  Option D: While farmer collectives are important, '100 Million Farmers has a broader scope encompassing sustainable practices and climate resilience.

* Green hydrogen is the hydrogen produced through electrolysis of water using electricity from renewable sources. * Green hydrogen is expected to play a significant role in decarbonizing all three of the mentioned heavy industries. * Green hydrogen can be used in the production of ammonia, which is a key component for many fertilizers. Fertilizer production is energy-intensive and often relies on fossil fuels, particularly natural gas. By using green hydrogen as a clean energy source, the carbon emissions from this industry can be significantly reduced * Green hydrogen can be used in oil refineries to process crude oil into various products, including gasoline, diesel, and jet fuel. This can help to reduce the carbon emissions from the refining process. * The steel industry is one of the largest industrial emitters of carbon dioxide. Green hydrogen can be used in place of coal in the steelmaking process, significantly reducing the industry's carbon emissions.