Bangkok Air Quality Remains Acceptable
Air quality in Bangkok was reported as acceptable on February 15, with the city's average PM2.5 level measuring 26 micrograms per cubic meter (µg/m³). The highest reading in the city was 37.3 µg/m³ in the Nong Chok district, which remained below the national safety standard.
- Agricultural burning, particularly of rice straw and sugarcane residue after harvesting, is a significant contributor to PM2.5 pollution in Bangkok, especially during the dry season from November to April. This practice is favored by farmers as a convenient and cost-saving measure to prepare fields for the next planting cycle. - In Bangkok's suburbs, biomass burning and vehicular emissions each contribute about 35% to particulate pollution, while in the city center, diesel vehicles are responsible for over 50% of PM2.5 during dry months. The burning of rice stubble is a major concern, given that nearly half of Thailand's arable land is used for rice cultivation. - The economic impact of air pollution on Thailand is substantial, with health damages from PM2.5 exposure in 2019 estimated to cost the country about 6 percent of its GDP. One study estimated the total social cost from air pollution in 2019 to be 2.17 trillion THB (almost 11% of GDP). - Thailand is promoting sustainable rice farming practices to mitigate environmental impacts. Initiatives like the Sustainable Rice Platform (SRP) standard and Cost Reduction Operating Principles (CROP) aim to reduce greenhouse gas emissions, water usage, and production costs while increasing farmer income. A full transition to sustainable rice practices could yield up to 50 billion USD in net benefits by 2050. - Rice cultivation accounts for 57.7% of Thailand's agricultural emissions and is a major source of methane. Traditional methods like flooding paddy fields and burning stubble contribute significantly to this. The government has committed to reducing rice-related emissions by 26 percent. - In response to the air quality crisis, a citizen-led Clean Air Act has been proposed in Thailand, shaped by advocates, researchers, and legal experts, and has received overwhelming public support. The act proposes a "Clean Air for Health Fund" to address the issue structurally, moving away from short-term policies. - While Thailand has focused on price support policies for rice farmers, these have cost over 1.2 trillion baht and discouraged technological adoption and efficiency improvements. Competitors like Vietnam and India have modernized their production systems, exporting better quality rice at lower costs.
