Cooking, Health, and Daily Exposure to Pollution Spikes
研究肯尼亚家庭烹饪产生的污染峰值对健康的影响，发现改进炉具虽降低烹饪时的PM2.5峰值并减轻自报呼吸道症状，但未带来临床健康改善，可能因平均暴露水平未变。
Many routine daily activities—such as cooking and commuting—cause large recurring pollution spikes that may impact health without significantly affecting average exposure. We study pollution spikes by combining experimental variation in cooking technology with high-frequency data on individual pollution exposure and time-use in Kenya. Improved cookstoves reduce PM2.5 spikes while cooking by 51.3 μg/m 3 (41 percent) and cause a 0.24 standard deviation reduction in self-reported respiratory symptoms. However, even after more than three years of daily use, we find no clinical health improvements, possibly because we detect no impact on average exposure. Clinical health improvements may require reductions in ambient concentrations.