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Windmillprint-crop.jpg Yes it is possible to print a windmill with a 3D printer for a fraction of the cost of manufacturing one conventionaly. Learn more about open-source 3-D printing of open source appropriate technology for sustainable development.


An LED traffic light
LED traffic light FAQ. Here are a number of frequently asked questions concerning retrofitting street lights with LEDs. For full information see LED.

What does an LED traffic light look like? An LED traffic light looks very similar to a regular traffic light. It still gets the job done and is actually brighter. An LED is actually very small and therefore the traffic light is made up of a bunch of smaller lights, this is apparent when you look closely. The color of the light depends on the exact composition inside the bulb.
Who Invented the LED? It all began when Oleg Vladimirovich created the first LED in 1927. There was no practical use for it until 1962 when it was discovered that the infrared LED could be changed into a visible red LED.
How does an LED work? An LED is basically a tiny light bulb with a semiconductor diode in place of a filament. Inside the diode, there are positively and negatively charged areas. When a voltage is applied to the diode with the positive end hooked up to the negative area and the negative end hooked up to the positive area the electrons inside become excited and jump from the positively charged to negatively charged areas. This interaction produces light.
What is a diode? A diode is a component that restricts the directional flow of charge carriers. Also a diode allows an electric current to flow in one direction, but blocks it in the opposite direction.

Sun Frost energy efficient shower

Conventional showers minimize thermal comfort, maximize energy use and water consumption, and exacerbating moisture problems... A solution?

Rachel Carson
The human race is challenged more than ever before to demonstrate our mastery, not over nature but of ourselves.

Kiva's straw bale greenhouse
An alternative or natural building involves a range of building systems and materials that place major emphasis on sustainability. Ways of achieving sustainability through natural building focus on durability and the use of minimally processed, plentiful or renewable resources, as well as those that, while recycled or salvaged, produce healthy living environments and maintain indoor air quality. Natural building tends to rely on human labor, more than technology. As Michael G. Smith observes, it depends on "local ecology, geology and climate; on the character of the particular building site, and on the needs and personalities of the builders and users."

The basis of natural building is the need to lessen the environmental impact of buildings and other supporting systems, without sacrificing comfort, health or aesthetics. To be more sustainable, natural building uses primarily abundantly available, renewable, reused or recycled materials. The use of rapidly renewable materials is increasingly a focus. In addition to relying on natural building materials, the emphasis on the architectural design is heightened. The orientation of a building, the utilization of local climate and site conditions, the emphasis on natural ventilation through design, fundamentally lessen operational costs and positively impact the environmental. Building compactly and minimizing the ecological footprint is common, as are on-site handling of energy acquisition, on-site water capture, alternate sewage treatment and water reuse.

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ENGR 215 Introduction to Design projects – Spring 2009: WaterPod: The Spring 2009 semester of ENGR215 Introduction to Design worked with the WaterPod to research, design, and build systems that foster the artists living sustainably onboard a barge in the waterways of New York City.

Spring 2009 ENGR 215 Intro to Design Projects - WaterPod
Bicycle Energy Generator
An alternative way to convert kinetic energy to AC power by means of a bicycle energy generator  
Soil-less Growing System
A system that would grow food for the occupants of the barge without the presence of soil  
Filter Commander 9000
A water filtration system to make drinkable water from rainwater catchment  
Tour de Volts
A bicycle as a power source to provide a bit of extra energy to the WaterPod  
WaterPod Hang Thyme
A hydroponic green wall that is used to grow herbs in minimal amounts of space  
FBD Rainwater Purification
Exists to provide clean drinking water for the WaterPod Project  
Coopatron 5000
A chicken coop designed to supplement the dietary needs of the inhabitants of the WaterPod  
Rocket Stove
To provide a reliable and sustainable means of cooking by minimizing fuel use and optimizing efficiency  
Pico in a Bucket
To harness the kinetic energy of the falling water from the overflow of the WaterPod's water tower  
WindPod Turbine
A vertical access wind turbine that uses the power of the wind coming from any direction to create energy  
Composting Toilet
Duchamp de Loo, is a composting toilet system that can be used and can educate people about environmental ways to get rid of human waste  

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