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Message: <blockquote data-quote="m0lsx" data-source="post: 185936" data-attributes="member: 29323">In third world countries where they need wood fires to cook, these burners,  can make a massive difference. Less wood being burned & less problematic gases within the home, make a real difference to peoples lives & these burners do not need to be made from metal. It is easy to make them from mud/clay.Deforestation adds to food production issues, as trees help to prevent soil erosion & flooding. Half of the earth's topsoil has been lost during the past 150 years & just over 70% of the world's surface is seawater, now deduct deserts, which take up 33% of the earth's land surface & that means we have lost 50% of the 20% that is, or was topsoil. And the loss  of topsoil causes any nutrients within the subsoil to degrade quicker & for salinity (salt levels,) within the remaining subsoil to also increase.</blockquote>