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in sustainability, appropriate technology, poverty reduction, and permaculture.
your site to find, co-create and improve the solutions we need. Our vision and mission.
Contributors have made 350,233 edits and uploaded 27,755 files. |
There are three common types of geothermal power: dry steam, flash steam, and binary cycle. Dry steam is rare and uses the steam directly from the earth, flash steam pumps the hot water that naturally occurs in the earth to the surface and utilizes its steam, and binary cycle uses a secondary fluid and its vapor to power a generator.
Dry stream geothermal plants use natural steam directly from the Earth. Once the steam pocket is tapped, the steam is channeled directly into a turbine which converts the thermal energy into electrical power. (more types follow)
Creating a solar cooker out of local invasive species and waste materials in order to pasteurize water and be an alternative to the use of fossil fuels for cooking food.
Feb 8 Resources UK: This is how we take back control: from the bottom up, George Monbiot [1]
Feb 8 Towards sustainable economies: The Mutual Aid Network Takes a Ground-Up Approach to Create a Collaborative Economy [2]
Feb 7 This wonderfully warm biodome will let Icelanders escape their cold, bleak winters [3]
Feb 6 Urban sustainability: The Fab City: It's More Than Just a City Full of Fab Labs [4]
Feb 6 Spain: Pamplona presents Sustainable Urban Mobility Plan [5]
| Read More... |
- Interview with Lonny Grafman on Passionate Voices
- Open-Source Solar-Powered 3-D Printers
- Fair Trade Standards for an Ethical 3-D Printing Filament
- FREE Chaps of Open-Source Lab: How to Build Your Own Hardware and Reduce Research Costs
- Recycle waste plastic into valuable products at home
- Students Build a School from Waste Products in the Dominican Republic
The Earth's water moves constantly through a cycle of evaporation and transpiration (evapotranspiration), precipitation, and runoff, usually reaching the sea. Over land, evaporation and transpiration contribute to the precipitation over land - thus deforestation and other changes to land can have wide and long-lasting effects through their impact on the water cycle. Some observers estimate that by 2025 more than half of the world population will be vulnerable to a lack of water. Appropriate water supply and water purification technologies can help. |
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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