非公式のレンガ炉による排出量と大気汚染の削減:バングラデシュからの証拠

Nina Brooks¹, Debashish Biswas², Sameer Maithel³

¹Department of Global Health, Boston University School of Public Health, Boston, MA, USA.

Science (New York, N.Y.)

|May 8, 2025

まとめ

バングラデシュのレンガ炉の運用改善によりエネルギー消費と排出量が大幅に削減されました環境にやさしい変化は民間企業にとって有利で公共の利益をもたらし非公式産業の潜在力を示しました

科学分野:

環境科学
産業エコロジー
エネルギー政策

背景:

レンガ炉は産業の主要排出源である.
非正規産業では清潔な生産方法が欠けていることが多いのです
ジグザグ型のレンガ炉は南アジアでよく見られていて,大気汚染にも寄与しています.

研究の目的:

バングラデシュのレンガ炉におけるエネルギー効率と排出量に関する実務介入の有効性を評価する.
改善された慣行の経済的実用性と環境上の利益を評価する.
非公式産業部門の持続的な改善の可能性を実証する.

主な方法:

バングラデシュの276の"ジグザグ"レンガ炉を対象としたランダム化制御試験.
エネルギー効率と排出量削減に重点を置いた運用慣行の導入
エネルギー使用量,二酸化炭素 (CO2) および粒子状物質 (PM2.5) の排出量,介入前と後の測定

主要な成果:

介入炉の65%が改善された慣行を採用した.
エネルギー消費は10.5%減少した (P<0.001).
CO2 (171 メートリックトン/kiln/年) とPM2.5 (0.45 メートリックトン/kiln/年) の排出量を大幅に削減する.
炭素"トンあたり185ドルという社会的な利益は費用を65倍上回る.
介入により燃料コストが減り,資本投資なしにレンガの品質が向上しました.

結論:

作業の改善により,エネルギー効率が向上し,レンガ炉の環境への影響が軽減されます.
この介入は公的な環境上の利益と,私的な経済的な収益性を示しています.
このアプローチは,世界中の非公式産業の環境問題に対処するためのスケーラブルなモデルを提供します.

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