What is Renewable: Definition and 65 Discussions

A renewable resource, also known as a flow resource, is a natural resource which will replenish to replace the portion depleted by usage and consumption, either through natural reproduction or other recurring processes in a finite amount of time in a human time scale. When such recovery rate of resources is unlikely to ever exceed a human time scale, these are called perpetual resources. Renewable resources are a part of Earth's natural environment and the largest components of its ecosphere. A positive life-cycle assessment is a key indicator of a resource's sustainability.
Definitions of renewable resources may also include agricultural production, as in agricultural products and to an extent water resources. In 1962, Paul Alfred Weiss defined renewable resources as: "The total range of living organisms providing man with life, fibres, etc...". Another type of renewable resources is renewable energy resources. Common sources of renewable energy include solar, geothermal and wind power, which are all categorized as renewable resources. Fresh water is an example of renewable resources.

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  1. T

    Renewable Energy (Gravitation)

    How the mechanism of gravity can converted to the electric energy?How much the power result? Please shared to me, if you have any literature..
  2. S

    Wind & Solar: A Renewable Energy Future?

    From the little bit I've read online it seems like wind and solar have the most potential. Also, can you get student loans if you are unemployed? (I have a good credit rating and I'm in the US)
  3. K

    : Renewable energy Vs. material physics

    Hello everybody! I am majoring in Applied Physics. Now i am asked to choose my specialisation option between Renewable energy and Material physics. Actually, i think that i can feel comfortable to any option between those but my problem is that i have to choose one. So which is the best between...
  4. V

    Help choosing final year project - renewable energy

    Hi guys, I am a mechanical engineering student and before the end of this year, I must select final year project to do research on. I am really interested in renewable energy and have a particular interest in wind energy/wind turbines. I am after a project that will require me to do site...
  5. D

    How Effective is Renewable Energy in Reducing Carbon Footprint?

    would appreciate a simple formula for how many kwh will eliminate so many pounds of CO2 how many cars does this take off the roadways how many euivalent trees planted? thanx
  6. G

    Schools Renewable Energy; Which University Major?

    If I wanted to become involved in the renewable energy field, which university major would serve me best? I've been accepted into an engineering program, so I was thinking ChemE, or MatE, but maybe even EE (solar panels?). Or would a degree in physics or chemistry serve me best?
  7. M

    How can I combine my love for physics with a career in renewable energy?

    i'm in my third year studying environmental engineering and I'm trying to decide what to do for grad school. my favorite subject is physics by far; I've really enjoyed my courses in dynamics, fluid mechanics, E & M, and statistical mechanics, which I'm taking as an elective. i also really liked...
  8. B

    Renewable Energy- I have a Dream

    Renewable Energy--- I have a Dream Three years ago, I found PF and was at this very same crossroad. Medcine? Or Phyical/Natural Science? I have this dream, to help creat free energy. Where does that fall into? An engineering course or straight away work for a pHd, running around in labs...
  9. J

    How to cash in on the renewable energy boom

    I figure that a lot of wind turbines are going to be produced, and the company's who produce them will get funding from the government. Is it a good idea to buy stock in whoever gets the biggest renewable energy contracts? I guess right now, most wind turbine makers are foreign, but they won't...
  10. M

    Working in Renewable Energy: What Courses Prepare You?

    What sort of courses would make me best equipped to work in the renewable energy sector? I'm increasingly interested in working in the energetics industry, but I'm currently studying physics and chemical engineering. Would mechanical engineering make more sense? Could someone who has worked...
  11. A

    Schools Renewable Energy University Research

    Are there any major universities doing research on renewable energy (solar power) or energy generation? It seems that many of the companies that are working on renewable energy are looking for EE degrees rather than physics degrees. Should I consider an EE degree if I want to do research in...
  12. V

    Renewable Resources: Comparing Differences

    what are the differences between renewable resources and renewable resources?
  13. K

    Non Carbon Renewable energy sources

    Non carbon based Alternative renewable fuel sources..Ideas out side of the Box. #1. WIND POWER using a gigantic wind sock. A Wind Drome. Let's imagine a high tensil lightweight material 1000 feet across and 1000 feet high funneling down to an opening only 10 feet by 10 feet at the small end. (...
  14. J

    Mechanical Engineering & Renewable Energy: A Future in Solar Power?

    I am a 3rd year mechanical engineering major currently working in an internship for a power company. My company recently sold off their wind and hydro generating plants because they could not compete with the coal plants. We now have only coal and gas/oil plants. I know that I could continue...
  15. H

    Exploring Solar Cells and Renewable Energy Sources

    Does solar cell really only absorbs energy from sunlight? What about other sources of radiation such as thermal radiation? Wouldn't it be great if there are some devices that can recycles energy produced in major cities and convert it into electrical energy?
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