2013年-世界发展银行全球_India___Diagnostic_Assessment_of_Select_Environmental_Challenges_Volume_2_Economic_Growth_and_Environmental_Sustainability_What_Are_the_Tradeoffs__50页_1mb

Summary of Report No. 70004-IN: India - Diagnostic Assessment of Select Environmental Challenges, Economic Growth and Environmental Sustainability

Core Content

This report evaluates the tradeoffs between economic growth and environmental sustainability in India, focusing on the impact of particulate matter (PM10) emissions. It uses a Computable General Equilibrium (CGE) model to simulate the effects of environmental taxes on GDP, health, and carbon emissions.

Main Viewpoints

• Environmental Challenge: Particulate pollution from fossil fuel combustion is a major environmental issue in India, with severe health impacts, especially in urban areas.
• Health Impacts: PM10 and other small particles are linked to cardiovascular and pulmonary diseases, and lung cancer. Their levels in most cities far exceed acceptable standards.
• Policy Instruments: Two types of taxes are considered to reduce PM10 emissions: a tax on coal and a tax on PM10 and other particles (which translates to taxes on fuels like coal and oil).
• Economic Impacts: Both tax scenarios result in GDP losses, with the coal tax causing a greater reduction in growth than the PM10 tax.
• Health Benefits: The health gains from reduced emissions are significant and can offset the economic costs.
• CO2 Emissions: Taxes lead to substantial reductions in CO2 emissions, which have monetary value and contribute to the overall benefits of the policy measures.
• CGE Model: The model is based on the GTAP framework and includes 57 sectors of the Indian economy, capturing the interactions between economic output and air pollution.

Key Information

Economic Growth and Environmental Sustainability

• The report examines the tradeoffs between economic growth and environmental sustainability in India.
• It evaluates the economic and environmental impacts of reducing PM10 and other small particle emissions.
• The goal is to achieve targeted emission reductions (10% and 30%) in 2030 while analyzing the effect on GDP and health.

Policy Scenarios

• Business as Usual (BAU): Based on historical economic performance and future GDP projections. It assumes continued economic growth and includes some emission reductions due to technological changes.
• Green Growth: A 10% reduction in PM10 emissions through a tax on coal. This leads to a shift to a greener fuel mix and modest energy efficiency gains.
• Green Growth Plus: A 30% reduction in PM10 emissions through the same tax instruments. This results in greater improvements in coal technology and larger emission reductions per unit of output.

Economic and Environmental Impacts

• GDP Impact:
  • A 10% PM10 reduction results in a GDP loss of approximately US$46 billion, or 0.3% of growth.
  • A 30% PM10 reduction results in a GDP loss of about US$97 billion, or 0.7% of growth.
  • Coal tax scenarios lead to even greater GDP losses (1.07% for 30% reduction).
• Health Benefits:
  • For a 10% reduction, health gains are estimated at US$35 billion in 2030.
  • For a 30% reduction, health gains are estimated at US$67 billion in 2030.
• CO2 Emissions:
  • A 10% PM10 reduction leads to a CO2 emission reduction of about 590 million tons in 2030.
  • A 30% PM10 reduction leads to a CO2 emission reduction of about 830 million tons in 2030.
• Valuation of Benefits:
  • Valuing CO2 reductions at US$10 per ton results in benefits that offset the GDP loss in the 10% case and are slightly less than the GDP loss in the 30% case.
  • Combined with health benefits, the total benefits outweigh the GDP loss in both scenarios.

Methodology

• The CGE model is used to simulate the economic and environmental impacts of policy instruments.
• The model incorporates 57 sectors of the Indian economy and tracks the link between economic output and air pollution.
• It includes assumptions about technological change, energy efficiency improvements, and the use of economic instruments to influence behavior.
• The health module is developed separately to estimate mortality and morbidity effects of particulate pollution.

Environmental and Health Context

• PM10 is the most problematic air pollutant in India, with concentrations far exceeding acceptable standards.
• The model includes both SPM and RSPM, with RSPM being more harmful due to its smaller particle size.
• The new NAAQS introduced in 2009 have tightened standards and eliminated the distinction between industrial and residential areas, requiring significant emission reductions.

Conclusion

• The results support the use of fiscal measures to address particulate pollution, as the health and environmental benefits outweigh the economic costs.
• Further research is needed to understand the distributional impacts of these taxes and the mechanisms by which they improve energy efficiency.
• The study highlights the importance of integrating environmental considerations into economic growth strategies to achieve sustainable development.