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Geoengineering to Combat Global Warming - UPSC Environment And Ecology
What is Geoengineering to Combat Global Warming in UPSC Environment And Ecology?
Geoengineering to Combat Global Warming is a key topic under Environment And Ecology for UPSC Civil Services Examination. Key points include: Geoengineering involves large-scale interventions to alter Earth's climate system to combat global warming.. It is classified into Solar Radiation Management (SRM) and Carbon Dioxide Removal (CDR).. SRM aims to reflect sunlight (e.g., diamond dust, stratospheric aerosols like from Mount Pinatubo).. Understanding this topic is essential for both UPSC Prelims and Mains preparation.
Why is Geoengineering to Combat Global Warming important for UPSC exam?
Geoengineering to Combat Global Warming is a Medium-level topic in UPSC Environment And Ecology. It is tested in both Prelims (factual MCQs) and Mains (analytical answer writing). Previous year UPSC questions have frequently covered aspects of Geoengineering to Combat Global Warming, making it essential for comprehensive IAS preparation.
How to prepare Geoengineering to Combat Global Warming for UPSC?
To prepare Geoengineering to Combat Global Warming for UPSC: (1) Study the comprehensive notes covering all key concepts on Vaidra. (2) Practice previous year questions on this topic. (3) Connect it with current affairs using daily updates. (4) Revise using key takeaways and mind maps available for Environment And Ecology. (5) Write practice answers linking Geoengineering to Combat Global Warming to related GS Paper topics.
Key takeaways of Geoengineering to Combat Global Warming for UPSC
- Geoengineering involves large-scale interventions to alter Earth's climate system to combat global warming.
- It is classified into Solar Radiation Management (SRM) and Carbon Dioxide Removal (CDR).
- SRM aims to reflect sunlight (e.g., diamond dust, stratospheric aerosols like from Mount Pinatubo).
- CDR aims to remove CO₂ from the atmosphere (e.g., Carbon Capture and Sequestration (CCS), Direct Air Capture (DAC), Carbon Capture, Utilization and Storage (CCUS)).
- Current emission reduction efforts are falling short (2% vs 43% target by 2030), increasing interest in geoengineering.
- Geoengineering faces significant ethical, governance, and environmental challenges.
Geoengineering to Combat Global Warming
Medium⏱️ 8 min read
environment and ecology
📖 Introduction
Introduction to Geoengineering
Geoengineering refers to large-scale interventions designed to deliberately alter the Earth's climate system. Its primary goal is to counteract the adverse effects of global warming, offering a potential, albeit controversial, pathway to climate mitigation.
A recent study proposed spraying millions of tonnes of diamond dust annually into the Earth’s upper atmosphere. This novel approach aims to lower the planet’s temperature by an estimated 1.6°C, potentially offering a more effective solution for Solar Radiation Management (SRM) than previously considered materials.
Achieving global climate targets requires a substantial 43% reduction in emissions from 2019 levels by 2030. Current global efforts, however, are projected to yield only a modest 2% decrease, highlighting the urgency for innovative and impactful solutions.
Classification of Geoengineering Approaches
Geoengineering primarily involves two distinct approaches, each targeting a different aspect of climate change mitigation:
- Solar Radiation Management (SRM): Focuses on reflecting sunlight back into space.
- Carbon Dioxide Removal (CDR): Aims to remove existing carbon dioxide from the atmosphere.
Solar Radiation Management (SRM)
SRM techniques involve deploying materials or modifying surfaces to reflect a portion of incoming solar rays away from the Earth. This method seeks to cool the planet by reducing the amount of solar energy absorbed by the Earth's surface.
While still largely conceptual, SRM draws inspiration from natural phenomena. For instance, the 1991 eruption of Mount Pinatubo in the Philippines reportedly reduced Earth's average temperature by approximately 0.5°C in that year, demonstrating the potential cooling effect of atmospheric aerosols.
Carbon Dioxide Removal (CDR) Techniques
CDR techniques are focused on the long-term reduction of atmospheric Carbon Dioxide (CO₂) levels. These methods directly address the root cause of global warming by removing greenhouse gases from the air.
- Carbon Capture and Sequestration (CCS): This is the main CDR method currently in practice. It involves capturing CO₂ emissions from industrial sources and storing them underground in suitable geological formations, preventing their release into the atmosphere.
- Direct Air Capture (DAC): This technique extracts CO₂ directly from ambient air using large devices, often referred to as “artificial trees.” The captured CO₂ can then be stored or utilized for other purposes.
DAC holds significant potential benefits as it can address historical CO₂ emissions already present in the atmosphere, not just new emissions. However, it also faces substantial technological and economic challenges.
- Carbon Capture, Utilization and Storage (CCUS): This approach combines carbon capture with the utilization of some of the captured CO₂ in various industrial processes. The remaining portion is then stored underground.
Related Challenges
The provided source material mentions 'Related Challenges' but does not detail them. Geoengineering, in general, faces significant challenges including ethical considerations, governance issues, potential unintended environmental side effects, and high implementation costs.
💡 Key Takeaways
- •Geoengineering involves large-scale interventions to alter Earth's climate system to combat global warming.
- •It is classified into Solar Radiation Management (SRM) and Carbon Dioxide Removal (CDR).
- •SRM aims to reflect sunlight (e.g., diamond dust, stratospheric aerosols like from Mount Pinatubo).
- •CDR aims to remove CO₂ from the atmosphere (e.g., Carbon Capture and Sequestration (CCS), Direct Air Capture (DAC), Carbon Capture, Utilization and Storage (CCUS)).
- •Current emission reduction efforts are falling short (2% vs 43% target by 2030), increasing interest in geoengineering.
- •Geoengineering faces significant ethical, governance, and environmental challenges.
🧠 Memory Techniques
95% Verified Content
📚 Reference Sources
•General scientific understanding of geoengineering concepts