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  1. Warm Heart Worldwide Published on Feb 25, 2016 warmheartworldwide.org In this video we show you how to make a basic Top Lit Up Draft Biochar Machine. Warm Heart have been teaching hundreds of farmers in the Northern Thailand how to make these machines in order to help reduce the smoke produced in...  
  2. Warm Heart Worldwide Published on Jan 20, 2017 We've conducted a series of interviews with the farmers who tested biochar in their rice field. Here are their thoughts about biochar.  

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