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|* '''Sanitation First''': 2.6 billion people in the world don't have access to a toilet. The reality of what this means may be hard for us lucky toilet-owners to imagine, so here's an [http://youtu.be/P6wkjWxEbKY animation] to help.

|* NEW ARTICLE: [[Biogas-fueled_pump|'''Biogas-fueled pump''']] - Using biogas for pumps in irrigation is gaining in popularity in India and elsewhere, as the savings in petroleum fuel prices are great. A diesel pump can also be converted into a bio-gas pump used for pumping water. The cheapest way to get biogas, once a pump is obtained, is to build a biomass digester, which means biomass must be collected, cultivated, or found.

|* NEW ARTICLE: [[Solar_water_heater_tank|'''Solar water heater tank''']] - A solar water heater is any system that uses the thermal energy of the sun to heat water. They are usually aimed at heating water to a temperature hot enough for washing clothes, washing dishes, and personal hygiene, but not hot enough to cook with straight away. However, as long as it is clean, the hot water can also be used in cooking to save time and fuel.

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