The EU's Carbon Border Adjustment Mechanism represents a structural shift in climate-trade policy, seeking to prevent carbon leakage by ensuring imported goods face carbon costs equivalent to those borne by EU producers.
CBAM requires importers of designated carbon-intensive goods to purchase CBAM certificates corresponding to the carbon price that would have been paid under EU Emissions Trading System (ETS) rules. This mirrors the cost faced by domestic producers, creating a level playing field rather than a punitive tariff. The certificate price tracks the weekly average ETS auction price.
The transitional phase, which began in October 2023, covers cement, iron and steel, aluminium, fertilisers, electricity, and hydrogen — sectors characterised by high carbon intensity and significant trade exposure. During this phase, importers face only reporting obligations, with financial obligations commencing from 2026 under the full implementation schedule.
CBAM is explicitly structured to be WTO-compatible, not inconsistent with WTO rules. It applies the same carbon cost to both domestic and imported goods, invoking the principle of non-discrimination. The EU frames it under GATT Article XX exceptions relating to environmental protection, though its WTO compatibility remains subject to ongoing legal and diplomatic scrutiny.
Countries like India, which export steel and aluminium to the EU, face competitiveness pressures. CBAM incentivises trading partners to adopt domestic carbon pricing, potentially accelerating global climate action, but also raises concerns about unilateral climate conditionality affecting developing-country exports.
CBAM marks a convergence of trade and climate governance. Its long-term effectiveness depends on equitable implementation, transparent carbon accounting, and multilateral dialogue to prevent it from becoming a disguised trade barrier.
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