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  1. 1984-01-01 Once it is understood that gravity and water can be harnessed to produce energy, a study of methods to extract this energy efficiently can be undertaken. The purpose of this paper is to discuss several such methods in general terms. The paper provides a basic introduction to the science of water...
  2. 2004-01-01 La OBRA. Inicia con una breve resena de los diferentes tipos de energias, su rol en el desarrollo mundial, la interrelacion entre energia, medio ambiente, contaminacion y desarrolo rural. Continua senalando con detalle las posibilidades que plantean las fuentes de energias alternativas para...
  3. 1980-01-01 Complete guide to energy-efficient living--an imaginative treatment of a most timely subject. Solutions and compromises for the problem of rapidly climbing costs of oil, gas and other fossil fuels. Also, advice on mixing and matching energy systems to fit the situtation. 191 pages, pictures,...
  4. This publication is part of a continuing attempt by the Regional Wood Energy Programme for Africa to document the activities of stove programmes in the east and southern African region.
  5. This book shows how, in your building or remodeling, you can turn chill winds and the hot sun to your advantage to keep your home airy and pleasant on hot days, snug and warm in winter. He has an exciting arrayof remodeling options and small changes for your pesent home, and excellent ideas on...