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Due to limited and unreliable rainfall most rivers are ephemeral seasonal sandy bed streams and only experience heavy water run-off for short periods of time after rain. During such periods of high flows, large quantities of sand are transported downstream while others get trapped on the upstream sides of rocks ledges along the stream. Such sand traps form natural aquifers that are capable of providing clean adequate water if well harnessed. Using appropriate technologies this can be exploited for water storage in the form of sand dams.
Turning corn cob agricultural waste into a cooking fuel that combats deforestation and indoor air pollution.
Oct 17 Climate action UK: Fracking protesters walk free after court quashes 'excessive' sentences [1]
Oct 15 France: 'I leave the car at home': how free buses are revolutionising one French city [2]
Oct 13 Climate action UK: Top climate scientist blasts UK’s fracking plans as 'aping Trump’ [3]
Oct 10 A City That Takes Climate Change Seriously: Paris [4]
Oct 9 Netherlands: Dutch appeals court upholds landmark climate change ruling [5]
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Building and encouraging alternatives to the single-occupant vehicle, or, for short "alternative transportation," is imperative. Some alternative transportation advocates have taken to using the term, sustainable transportation, instead of the previous, widely-used "alternative transportation" term to avoid sidelining their interest from the mainstream. Many efficient, practical, and inexpensive sustainable transportation technologies already exist, meaning activism, policy work, and planning research is most often more crucial to developing sustainable transportation than technology development. |
Engr305 Appropriate Technology Projects: Below are selected service learning projects from Engr305 Appropriate Technology, which is a course on appropriate technology at Humboldt State University taught by instructor Lonny Grafman.
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