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Sharing knowledge to build rich, sustainable lives.

Appropedia is for collaborative solutions
in sustainability, appropriate technology, poverty reduction, and permaculture.

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Browse our categories or all 8,172 articles.

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To catch the rain cover.png You made it happen! Get a paperback on Amazon or digitally at http://www.tocatchtherain.org.


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DC circuit analogy: 1 Tank 2 Parallel Blenders

Electricity basics. Some basic definitions, equations and analogies of electricity.
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FBP Nutsy

Nutsy, the modified Universal Nut Sheller for home use.

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Community action news

Totnes High Street.jpg

Dec 7 Totnes: ShareFest brings people together to share, repair, swap and make [1]

Dec 5 Climate action USA: With a Green New Deal, here's what the world could look like for the next generation [2]

Dec 4 France: Have imagination, will travel: 2 days in Brest, Rob Hopkins [3]

Dec 3 Climate action USA: The two fastest-growing jobs in the U.S. right now are solar installers and wind technicians. [4]

Dec 1 Climate news 2018: Bristol to Brooklyn, Paris to Pittsburgh: restless cities act themselves on climate crisis [5]

Read More...


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Albert Einstein
It is high time that the ideal of success should be replaced by the ideal of service.

— Albert EinsteinW
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Hot topics / In the news

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Blog

Bicycle wheel
Transport. According to the Appropriate transport manual, sustainable transportation is a strategy for the flow of people and goods across the Earth that meets the needs of the present without compromising the ability of future generations to meet their own needs. Transportation accounted for 32.6% of US green house gas emissions in 2005. In addition to the widely publicized environmental consequences of driving automobiles, it is also socially and economically costly:
  • Land use: Parking and roads use valuable land resources.
  • Transportation equity: Driving, with all of its expenses, costs the average U.S. household $7,000 per year per vehicle.
  • Economics: Most of the money spent on driving leaves a local economy, weakening it.
  • Community: Travelers outside of their cars interact more with their physical environment and each other.
  • Safety: The presence of pedestrians and cyclists make our neighborhoods safer from crime. Conversely, 42,000 Americans are killed in car accidents every year.
  • Health: Increasingly, Americans are suffering from weight-related illnesses. This is partly attributable to the decline in active transportation use and availability.

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.

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ENGR 215 Introduction to Design projects – Fall 2010: HBCSL Somoa Hostel: The Fall 2010 semester of Engineering 215 worked with Humboldt Bay Center for Sustainable Living to design and build projects that support a proposed eco-hostel in Humboldt County.

Fall 2010 ENGR 215 Intro to Design Projects - HBCSL
Thermosyphon Solar Shower System
 An outdoor shower that utilizes solar energy to heat the water  
Samoa Hostel Truth Tank
 Provides greywater treatment system for a satellite solar shower  
Samoa Hostel Wattimus Prime
 A metering scheme that monitors the amount of energy used by the visitors  
Can You Feel The Heatloss?
 An education display about convection and heat loss  
Samoa Hostel Natural Paints
 A natural paint display to educate visitors of the Samoa Hostel  
Pain in the Axle
 A bicycle-powered electrical generator that powers a television and DVD player  
Samoa Hostel Windbelt
An array of wind belts that can charge a cell phone  
The Mechanical Munchy-Maker
 A mechanical bicycle that generates energy to power a kitchen appliance  
Samoa Hostel Insulation Station
 Educates visitors about the effectiveness insulation types and their relative costs  
Samoa Hostel greywater island
Models, designs, and educates guests and implementers of hostel size greywater treatment  
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