Renewable Energy Can We Rely on Wind and Solar Energy? 7 months ago   09:21

Bozeman Science
028 - Renewable Energy

In this video Paul Andersen discusses the technology, advantages and disadvantages of six sources of renewable energy; biomass, hydroelectric, solar, geothermal wind, and hydrogen. He also explains how changes in the storage and flow of energy in our power grid must be improved. He also lists the energy returned over energy invested ration for the various forms of energy.

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afloresm. (2007). Español: Solúcar PS10 es una planta solar termoeléctrica por tecnología de torre, la primera en el mundo explotada comercialmente. Retrieved from
Andrewglaser. (2009). English: The Solar Settlement with the Sun Ship in the background: Freiburg, Germany. Retrieved from
Canada, A. D. from W. Yukon. (2012). Woodpile. Retrieved from
company, J. J. owner of A. H. S. an appliance. (2013). English: Here is a picture of a man stoking the fire in a wood burning stove. Retrieved from
Delphi234. (2014). English: Total world energy consumption by source 2013, from REN21 Renewables 2014 Global Status Report. Retrieved from
EarthBy barretr. (n.d.). Retrieved from
Energy, D. of. (2010). English: Geothermal energy setup. Retrieved from
en.wikipedia, O. uploader was V. at. (2007). English: A particle motion in an ocean wave. Retrieved from
Germany, J. from S. (2005). English: Wind turbines in a rapeseed field in Sandesneben, Germany. Retrieved from
Hijau, B. (2008). Wood fuel heater. Retrieved from
Hillewaert, H. (2008). English: Newly constructed windmills D4 (nearest) to D1 on the Thornton Bank. Retrieved from ([object HTMLTableCellElement]). English: Passive solar heating illustration. Retrieved from
Institut, P. (2006). Original Passivhaus, Darmstadt, in spring. Retrieved from
KVDP. (2008). English: A picture of a house fitted with thermodynamic panels. Retrieved from
Ledebur, A. (1895). English: Charcoal pile. Retrieved from
m, dan. (2007). English: Power grid Gowkthrapple Pylons and power cables. Retrieved from
Photographer, D. A. R. (2005). English: Title: Technology: Lab. Retrieved from
Rolypolyman. (2008). English: United States Power Grid. Retrieved from
Romary. (2007). Français : Charbon de bois. Retrieved from, E. S. (2010). English: Reporting from Geo Homes,. Retrieved from
Shizhao拍摄. (2005). English: Biodiesel sample. Retrieved from
Technologies, O. P. (2011). English: OPT’s PB150 PowerBuoy. Retrieved from

Comments 40 Comments

Michael Stoski
"We really live in a society"
Stella Joy
Nastassia C
Okay! I know this sounds heartless but some people are going to have to go. Earth is populated lol
onlineTV sports
This is Great sir your lecture i transform in to document it was very helpful
emi rumpf
*I'm taking a training course in solar panel installation, repair and maintenance. My instructor recommended this book [link here >>>**** ] as an excellent resource along with the course. I'm finding it invaluable. By buying it through Amazon, I saved considerable money and received it very quickly.*
Saw it thank you.
Wave and tidal... where is that ?
samreen fatima
He has good style of speaking.
Gabe Gemma
Hello Andrew
abdi ali Guuleed
Tanks you gave me good explanation
Władca Wymiaru
Oh please:
terrible truth about "renewables"
bad for human health:
it just CAN'T be done:

The ULTIMATE energy source is there:
over 200 times more energy
near endless source of energy...
50 quadrillion dollars discovery
Shanta Hsieh
If you like to make your own energy you should go to Avasva
Ebru Askn
Thanks for sharing this information with us. Su usefull.
Corey Burton
Say EINSTEIN. Then use the three letters EIN when saying Turb-INE.
Kadin Hernandez
My power bill was $300 this previous month. It seemed absurd to me that it would reach this high. Something had to be done. With the generating power method “boma fetching unique” (Google it), my electric bill is now diminished by around 60% because I was able to produce power, also. And that`s not just temporarily-that`s forever.
Lane Gaspar
There should be no difficulty in trying to decrease your utility bill. In fact, it’s the easy options we make which could have a biggest impact. By using this generating power technique “boma fetching unique” (Google it), you can make your own power and save cash on bills.
Pragna Parikh
That was very helpful.
Swan Town
Binge watching all your videos for tomorrow's AP Environmental Science Exam at 8 AM, Wooooo, so excited :( Hope the exam goes well, also great work on these videos Mr. Anderson.
Erik Sundell
Well produced videos. But as a teacher in physics I dare not use them to educate my pupils, since the errors are to big and they will be misled. Start by fixing:

Error 1: Watts is not a measure of energy. TWh, kWh and J are common measures of energy though. What did you really mean with your numbers?
Your Outro Sounds like the ending of Mr.Bightside by The Killers
Add Reply

Can We Rely on Wind and Solar Energy? Renewable Energy 7 months ago   04:24

Is green energy, particularly wind and solar energy, the solution to our climate and energy problems? Or should we be relying on things like natural gas, nuclear energy, and even coal for our energy needs and environmental obligations? Alex Epstein of the Center for Industrial Progress explains.
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Are wind and solar power the answer to our energy needs? There’s a lot of sun and a lot of wind. They’re free. They’re clean. No CO2 emissions. So, what’s the problem?

Why do solar and wind combined provide less than 2% of the world’s energy?

To answer these questions, we need to understand what makes energy, or anything else for that matter, cheap and plentiful.

For something to be cheap and plentiful, every part of the process to produce it, including every input that goes into it, must be cheap and plentiful.

Yes, the sun is free. Yes, wind is free. But the process of turning sunlight and wind into useable energy on a mass scale is far from free. In fact, compared to the other sources of energy -- fossil fuels, nuclear power, and hydroelectric power, solar and wind power are very expensive.

The basic problem is that sunlight and wind as energy sources are both weak (the more technical term is dilute) and unreliable (the more technical term is intermittent). It takes a lot of resources to collect and concentrate them, and even more resources to make them available on-demand. These are called the diluteness problem and the intermittency problem.

The diluteness problem is that, unlike coal or oil, the sun and the wind don’t deliver concentrated energy -- which means you need a lot of additional materials to produce a unit of energy.

For solar power, such materials can include highly purified silicon, phosphorus, boron, and a dozen other complex compounds like titanium dioxide. All these materials have to be mined, refined and/or manufactured in order to make solar panels. Those industrial processes take a lot of energy.

For wind, needed materials include high-performance compounds for turbine blades and the rare-earth metal neodymium for lightweight, specialty magnets, as well as the steel and concrete necessary to build structures -- thousands of them -- as tall as skyscrapers.

And as big a problem as diluteness is, it’s nothing compared to the intermittency problem. This isn’t exactly a news flash, but the sun doesn’t shine all the time. And the wind doesn’t blow all the time. The only way for solar and wind to be truly useful would be if we could store them so that they would be available when we needed them. You can store oil in a tank. Where do you store solar or wind energy? No such mass-storage system exists. Which is why, in the entire world, there is not one real or proposed independent, freestanding solar or wind power plant. All of them require backup. And guess what the go-to back-up is: fossil fuel.

Here’s what solar and wind electricity look like in Germany, which is the world’s leader in “renewables”. The word erratic leaps to mind. Wind is constantly varying, sometimes disappearing completely. And solar produces little in the winter months when Germany most needs energy.

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