Detail Clever Tricks for Cleaner Bricks   Oleh:  [s.n] Jenis: Article from Bulletin/Magazine Dalam koleksi: The Economist (http://search.proquest.com/) vol. 403 no. 8787 (Jun. 2012), page S5-S6. Topik: Changes; Pollution; Emissions Ketersediaan Perpustakaan Pusat (Semanggi) Nomor Panggil: EE29.72 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada     Lihat Detail Induk Isi artikel India's brick kilns are noxious sources of pollution, particularly soot, and working them means a life that is always nasty, frequently brutish and often short. But on top of this social evil is an environmental one. The exhaust from the kilns mixes with diesel emissions and other fumes to form a vast brown smog, known as an atmospheric brown cloud, which is up to 3km thick and thousands of kilometres long. Two of its main ingredients, the small carbon particles which the soot is composed of, and ozone, a triatomic form of oxygen, are important contributors to the greenhouse effect, and thus to climate change. Among other negative effects, the cloud is thought to be accelerating the retreat of Himalayan glaciers, which are found at a similar altitude. In theory, burning the coal that fires the kilns in a more efficient and less polluting way should save money for the kiln's owners--an alignment of interests that might encourage the change to happen. Unfortunately, the main recommended change of design (at least, the change recommended by the United Nations Environment Programme) is a rather expensive one: to switch from the traditional style of kiln, known as a Bull's trench kiln, to a more modern design called a vertical-shaft kiln. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Kembali

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