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Community Action for Sustainability News

  • Future generations bill sounds 'namby pamby' but it's start, says Lord Bird, Feb 20 [1] ...UK Climate news 2021
  • We’re delighted to discover Cape Town’s CANs movement - “community action networks” that have been keeping a city together, under Covid, Feb 19 [2] ...South Africa
  • 'Invisible killer': fossil fuels caused 8.7m deaths globally in 2018, research finds, Feb 9 [3] ...Environment quality news
  • The Scottish Citizens Assembly has concluded - and one of its big proposals is a "House of Citizens", as a second chamber for Holyrood, Feb 8 [4]
  • Nature is a blind spot in economics that we ignore at our peril, says Dasgupta Review, Feb 2 [5] ...Biodiversity UK news
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From Rice hulls in construction
The First Rice Hull House, by Paul A. Olivier, Ph.D
Rice hulls are unique within nature. They contain approximately 20% opaline silica in combination with a large amount of the phenyl propanoid structural polymer called lignin. This abundant agricultural waste has all of the properties one could ever expect of some of the best insulating materials. Recent ASTM testing conducted R&D Services of Cookville, Tennessee, reveals that rice hulls do not flame or smolder very easily, they are highly resistant to moisture penetration and fungal decomposition, they do not transfer heat very well, they do not smell or emit gases, and they are not corrosive with respect to aluminum, copper or steel. In their raw and unprocessed state, rice hulls constitute a Class A or Class I insulation material, and therefore, they can be used very economically to insulate the wall, floor and roof cavities of a super-insulated Rice Hull House. This paper also explains how the structure of such a house can be fashioned out of a variety of engineered lumber products derived from sugarcane rind.
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From Engr305 Appropriate Technology Projects § CCAT

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Johann Wolfgang von Goethe

My friend, all theory is gray, and the Golden tree of life is green.

— Johann Wolfgang von Goethe
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