世界银行-尼泊尔清洁空气_益处_污染源和解决方案_立方氮化硼（英）-2025_161页_16mb

Summary of "Towards Clean Air in Nepal: Benefits, Pollution Sources, and Solutions"

Overview:

This report analyzes Nepal's air quality challenges, assesses health and economic costs, identifies pollution sources, and proposes solutions to achieve the 2035 target of 35 µg/m³ PM2.5 (WHO interim standard). Collaboration across national, provincial, and regional levels is emphasized due to transboundary air pollution.

Key Findings:

• Air Quality Status:

  • PM2.5 exceeds WHO targets (5 µg/m³) in Kathmandu (37 µg/m³ in 2021) and the Terai (39 µg/m³), increasing to 51 µg/m³ and 42 µg/m³ by 2035 without intervention.
  • Pollution is stable in Kathmandu but rising in the Terai; source apportionment shows local emissions (household, transport, industry) combined with regional inputs.

• Health and Economic Costs:

  • Air pollution causes 26,000 premature deaths annually (3.4 years lost per capita), linked to COPD, stroke, heart disease, and childhood stunting.
  • Economic costs amount to ~6% of GDP annually; failure to improve air quality could force trillions in healthcare costs and hinder development.

Priority Measures:

1. Cleaner Boilers: Electric or biomass pellet boilers with filters for industrial use (~7% of total measure potential).
2. Improved Cookstoves: Electric induction or fan-assisted biomass stoves to reduce household emissions (~20% potential).
3. Vehicle Upgrades: Euro-IV/LV standards for light-duty vehicles, Euro-VI for heavy-duty vehicles (~18% potential).

Enabling Foundations:

• Data: Expand monitoring networks, implement source apportionment studies, and ensure real-time public data access.
• Rules: Strengthen enforcement of emissions standards (e.g., vehicle inspections, stack emissions testing).
• Economics: Integrate environmental taxes (Green Tax) with revenue recycling to finance clean transitions (e.g., EV incentives).
• Incentives: Provide grants/participation programs for adopting cleaner tech.
• Infrastructure: Build EV charging, expand green electricity grids, and enhance open burning controls.

Recommendations:

• Nepal must strengthen local and transboundary cooperation via platforms like the IGP-HF Science-Policy-Finance Dialogue to limit pollution inflows.
• Budget allocation should prioritize low-cost measures initially, with aggressive cost-effective portfolios at scale ultimately needed to meet the 2035 target.