Which one of the following statements best describes the term 'Social Cost of Carbon'? It is a measure, in monetary value, of the
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- Along-term damage done by a tonne of CO2 emissions in a given year.
- Brequirement of fossil fuels for a country to provide goods and services to its citizens, based on the burning of those fuels.
- Cefforts put in by a climate refugee to adapt to live in a new place.
- Dcontribution of an individual person to the carbon footprint on the planet Earth.
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Answer: (A) long-term damage done by a tonne of CO2 emissions in a given year.
The Social Cost of Carbon (SCC) is a way to put a DOLLAR VALUE on the damage caused by emitting greenhouse gases.
Simply put: if you release one extra tonne of CO2 into the atmosphere today, the SCC estimates how much economic damage that will cause over time — through things like sea level rise, agricultural losses, health impacts, and extreme weather events.
For example, India's SCC is estimated at about $86 per tonne of CO2. At current emission levels, India loses roughly $210 billion annually due to climate change damages.
This number helps policymakers decide whether climate action is worth the investment — if reducing 1 tonne of CO2 costs less than $86, it's economically beneficial to do so.
Why not the others?
- B: This describes fossil fuel consumption, not damage cost.
- C: This describes climate refugee adaptation costs.
- D: This describes individual carbon footprint, not the economic damage.
Answer: A.
Key Takeaway: Social Cost of Carbon = dollar value of damage from 1 tonne of CO2 emissions. India's SCC ≈ $86/tonne. It's a decision-making tool for climate policy.
Social Cost of Carbon puts a dollar value on climate damage - India's SCC is approximately $86 per tonne of CO2, with annual climate damages around $210 billion.
Carbon pricing and SCC calculations became prominent in international climate policy discussions around 2019-2020, especially for developing countries like India to justify climate investments.
The question tests whether students understand SCC measures future economic damage from current emissions, not present costs of consumption or adaptation.
Social Cost of Carbon (SCC)
Environment Social Cost of Carbon
Social Cost of Carbon: Economic Valuation of Climate Damage
Social Cost of Carbon (SCC) = monetary value of damage from 1 tonne of CO2 emissions
India's SCC is approximately $86 per tonne of CO2
Used by policymakers to decide if climate action is economically justified
India loses roughly $210 billion annually due to climate damages
What is SCC
Social Cost of Carbon (SCC) puts a dollar value on climate damage. If you emit one extra tonne of CO2 today, SCC estimates the total economic harm it will cause over decades through sea level rise, crop failures, health impacts, and extreme weather.
SCC vs Related Concepts
Concept | What it Measures | Example |
|---|---|---|
Social Cost of Carbon | Economic damage from 1 tonne CO2 | India: $86/tonne |
Carbon Footprint | Total emissions by individual/country | Individual: 2-8 tonnes CO2/year |
Fossil Fuel Requirement | Energy needs for goods/services | Coal needed for steel production |
Climate Adaptation Cost | Money spent to adjust to climate change | Building sea walls, drought-resistant crops |
How SCC Works
Damage calculation: Links CO2 emissions to economic losses across agriculture, health, infrastructure, and productivity
Time horizon: Accounts for cumulative damage over 100+ years from a single emission
Policy tool: If reducing 1 tonne CO2 costs less than the SCC, the action is economically beneficial
Variable by country: Developing countries like India have higher SCC due to greater climate vulnerability
Question Connection
This question tested the core definition of SCC. Option A correctly identifies it as long-term damage from CO2 emissions. Options B, C, and D describe different climate-related costs but not the SCC specifically.
Trap: Confusing SCC with individual carbon footprint — SCC measures damage cost, not emission amount
Trap: Thinking SCC only covers immediate costs — it measures long-term cumulative damage
Trap: Mixing up SCC with adaptation costs — SCC is damage valuation, not spending on climate resilience
Carbon Pricing Mechanisms
Environment
Carbon Pricing: Tools to Put Cost on Emissions
Carbon pricing makes emitters pay for climate damage they cause
Two main types: carbon tax (direct price) and cap-and-trade (market price)
Paris Agreement Article 6 allows international carbon trading
Why Carbon Pricing
Carbon pricing puts a cost on greenhouse gas emissions to encourage cleaner alternatives. It makes the hidden cost of climate damage visible in market prices, guiding investment toward low-carbon solutions.
Carbon Pricing Methods
Method | How it Works | Price Setting | Examples |
|---|---|---|---|
Carbon Tax | Direct tax per tonne CO2 | Government sets fixed price | Canada: $50/tonne by 2022 |
Cap-and-Trade | Emission limits + tradeable permits | Market determines price | EU ETS, California |
Carbon Credits | Pay for emission reductions elsewhere | Project-based pricing | Clean Development Mechanism |
Internal Carbon Price | Companies set internal CO2 cost | Corporate decision | Shell, Microsoft use $40-100/tonne |
India's Carbon Pricing Approach
Perform, Achieve and Trade (PAT): Mandatory energy efficiency trading for large industries
Coal cess: ₹400 per tonne of coal (later merged into GST compensation cess)
Renewable Energy Certificates (RECs): Trading mechanism for green energy
No explicit carbon tax yet, but considering carbon border adjustment response
Trap: Confusing carbon tax (government-set price) with cap-and-trade (market-set price)
Trap: Thinking carbon pricing only includes taxes — it also covers trading systems and credits
Economic Impacts of Climate Change
Environment
Climate Change: Economic Costs and Sectoral Impacts
Climate change could reduce India's GDP by 2.6% annually by 2100
Major economic losses through agriculture, health, infrastructure, and productivity
Heat stress alone could cost India 34 million full-time jobs by 2030
Economic Damage Channels
Climate change hits the economy through multiple pathways: crop yield losses from heat and drought, health costs from air pollution and extreme heat, infrastructure damage from floods and storms, and reduced worker productivity in hot conditions.
Sectoral Economic Impacts
Sector | Climate Impact | Economic Loss | India Context |
|---|---|---|---|
Agriculture | Heat stress, irregular rainfall | 20-25% yield loss by 2050 | Rice, wheat productivity declining |
Health | Heat waves, air pollution, diseases | $40 billion annually by 2030 | Urban heat islands in Delhi, Mumbai |
Infrastructure | Floods, cyclones, sea level rise | $35 billion annually | Coastal cities like Chennai, Kolkata |
Labor Productivity | Heat stress, extreme weather | 34 million jobs at risk | Construction, agriculture workers |
Global Economic Estimates
Stern Review: Climate change could cost 5-20% of global GDP without action vs 1% GDP for mitigation
DICE model: Estimates optimal carbon tax at $37-185 per tonne CO2
Tipping points: Irreversible changes (ice sheet collapse, forest dieback) create much higher costs
Developing countries: Face 2-9% GDP loss vs 1-5% for developed countries due to higher vulnerability
Trap: Underestimating India's vulnerability — developing countries face higher economic costs than developed ones
Trap: Focusing only on temperature rise — extreme weather events cause most economic damage