Page 204 - 全球气候变化及其影响Global Climate Change and Its Impacts-185×260

Global Climate Change and Its Impacts

research, development, and promotion of low-carbon technologies, or be used tocompensate
those affectedby climate change.
2. Implementation Effectiveness of Carbon Tax
The effectiveness of carbon tax implementation varies across different countries and
regions. For example, Nordic countries (such as Sweden and Finland) that have implemented
carbon taxes since the 1990s have reached tax rates of $100-150 per ton of CO2 equivalent,
significantly driving energy transition and greenhouse gas emissions reduction in these coun-
tries. Sweden’s carbon tax implementation has been particularly remarkable, with its green-
house gas emissions decreasing by 25% over the past 30 years while maintaining unaffected
economic growth.
However, the implementation of carbon taxes also faces several challenges. First, the
setting of carbon tax rates needs to balance emission reduction goals and economic devel-
opment needs. Excessively high tax rates may lead to increased corporate costs and affect
economic growth, while overly low tax rates struggle to achieve emission reduction targets.
Second, carbon tax implementation requires robust monitoring and enforcement mechanisms
to ensure emitters accurately report emissions and pay corresponding taxes. Finally, carbon
taxes may raise social equity issues, as low-income groups could be disproportionately af-
fected by rising energy prices. Therefore, measures such as tax revenue redistribution are
needed to mitigate this problem.
(II) Carbon Trading: Cap-and-Trade Mechanism
Carbon Tradingis a cap-and-trade mechanism that sets an upper limit on total green-
house gas emissions and allows trading of emission quotas among emitters, incentivizing
emission reductions.Carbon Tradingoperates through its core mechanism of “Cap-and-Trade”:
governments set a fixed emissions cap (Cap), allocate emission quotas to emitters, who can
then trade these quotas (Trade) in the market.
1. Carbon TradingOperational Mechanism
Carbon TradingThe mechanism of carbon trading primarily guides emitters to reduce
greenhouse gas emissions through market mechanisms. After the total emissions cap is estab-
lished, emission allowances become scarce resources whose prices are determined by market
supply and demand. Emitters can meet their emission requirements by either reducing emis-
sions or purchasing additional allowances, thereby incentivizing the adoption of emission
reduction measures. Additionally,Carbon tradingmechanisms can provide governments with
financial support through the auctioning of emission allowances, which can be used for the
research, development, and promotion of low-carbon technologies.
2. Carbon tradingImplementation effectiveness
Carbon tradingThe implementation effectiveness varies across different countries and
regions. For example, the European Union Emissions Trading System (EU ETS) is the
world’s largestCarbon tradingmarket, covering the electricity, industrial, and aviation sectors
of 27 EU member states and 3 non-member countries, accounting for approximately 45% of

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