How much land mass would renewables need to power a nation like the UK? An entire country's worth. In this pragmatic talk, David MacKay tours the basic mathematics that show worrying limitations on our sustainable energy options and explains why we should pursue them anyway. (Filmed at TEDxWarwick.)

Lesson by David MacKay.

Environmentalists have long promoted renewable energy sources like solar panels and wind farms to save the climate. But what about when those technologies destroy the environment? In this provocative talk, Time Magazine “Hero of the Environment” and energy expert, Michael Shellenberger explains why solar and wind farms require so much land for mining and energy production, and an alternative path to saving both the climate and the natural environment. Michael Shellenberger is a Time Magazine Hero of the Environment and President of Environmental Progress, a research and policy organization. A lifelong environmentalist, Michael changed his mind about nuclear energy and has helped save enough nuclear reactors to prevent an increase in carbon emissions equivalent to adding more than 10 million cars to the road. He lives in Berkeley, California. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx

In which John Green teaches you about Iran's Revolutions. Yes, revolutions plural. What was the1979 Iranian Revolution about? It turns out, Iran has a pretty long history of unrest in order to put power in the hands of the people, and the most recent revolution in 1979 was, at least at first, not necessarily about creating an Islamic state. It certainly turned out to be about that, but it was initially just about people who wanted to get rid of an oppressive regime. Listen up as John teaches you about Iran's long history of revolution.

Citation 1: Caryl, Christian. Strange Rebels: 1979 and the Birth of the 21st Century. New York, Basic Books. 2014, p. 11
Citation 2: Axworthy, Michael, Revolutionary Iran: A History of the Islamic Republic. Oxford U. Press. 2014, p. 62
Citation 3: Quoted in Axworthy, p. 81
Citation 4: Axworthy, p. 114
Citation 5: Axworthy, p. 163

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Errors: I made an off hand comment about adding efficiencies in the video without thinking. This is obviously incorrect, but the final calculation does in fact multiply the efficiencies.

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Today on Crash Course Economics, Adriene and Jacob talk about the 2008 financial crisis and the US Goverment's response to the troubles. So, all this starts with home mortgages, and the use of mortgages as an investment instrument. For years, it seemed like the US housing market would go up and up. Like a bubble or something. It turns out it was a bubble. But not the good kind. And the government response was...interesting. Anyway, why are you reading this? Watch the video!

More Financial Crisis Resources:

Financial Crisis Inquiry Report: http://www.gpo.gov/fdsys/pkg/GPO-FCIC/pdf/GPO-FCIC.pdf

TAL: Giant Pool of Money: http://www.thisamericanlife.org/radio-archives/episode/355/the-giant-pool-of-money

Timeline of the crisis: https://www.stlouisfed.org/financial-crisis/full-timeline

http://www.economist.com/news/schoolsbrief/21584534-effects-financial-crisis-are-still-being-felt-five-years-article

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Scientists in the nineteenth century discovered a lot about life and matter. But exactly what kind of stuff is the human brain? That one was—and is—tricky.

The brain sciences—with experiments and therapies tied to biological theories of the body—emerged in the nineteenth century and came into their own in the early twentieth.

***

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15 Jobs That Will Thrive in the Future | Sunday Motivation
SUBSCRIBE to ALUX: https://ufl.ae/profile/KSDzFjESlChAO5uBmh_-7uKw
15 Jobs That Will Disappear Due to A.I.: https://ufl.ae/videow/h211k89uKqO

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Video Notes: https://www.alux.com/jobs-future/

In this Alux.com video we'll try to answer the following questions:
Which jobs will survive in the future?
What will be the best paying jobs in the future?
What are the best careers for the future?
Which jobs will not be affected by Artificial Intelligence?
Which jobs are safe from automation?
Which will be the best paying jobs in the future?
How to prepare for A.I.?
What kind of jobs will people do in the future?
Which are the fastest growing industries?
Which industries will blow up in the future?
What should you study if you want a job when you graduate?


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We spent an amazing day at the Sustainable City, a housing development in Dubai with 3,500 people already living there and it's still not quite finished.
This truly is a remarkable achievement, a stark lesson to building contractors the world over. It's not more expensive to build and it's hugely cheaper and more efficient to live in. Inspiring sustainable city planning!
Spread the word if you know any builders!

More Info: http://www.thesustainablecity.ae/

Support the show on Patreon: https://www.patreon.com/FullyChargedShow

We’ve introduced the 0th and 1st laws of thermodynamics, so now it’s time to move on to the second law and how we came to understand it. We’ll explain the differences between the first and second law, and we’ll talk about the Carnot cycle and why we can never design a perfectly efficient engine.

This episode is sponsored by CuriosityStream: http://curiositystream.com/crashcourse

Crash Course Engineering is produced in association with PBS Digital Studios: https://www.youtube.com/playlist?list=PL1mtdjDVOoOqJzeaJAV15Tq0tZ1vKj7ZV

***

RESOURCES:
http://www.thedrive.com/tech/18919/toyota-develops-worlds-most-thermally-efficient-2-0-liter-engine
https://newsroom.toyota.co.jp/en/powertrain2018/engine/
https://www.gepower.com/content/dam/gepower-pgdp/global/en_US/documents/product/gas%20turbines/Fact%20Sheet/7ha-fact-sheet-oct15.pdf
http://www.gasturbineworld.com/ge-7ha.html
https://www.livescience.com/50941-second-law-thermodynamics.html
https://www.khanacademy.org/science/biology/energy-and-enzymes/the-laws-of-thermodynamics/a/the-laws-of-thermodynamics
http://www.zo.utexas.edu/courses/thoc/Thermodynamics.html
http://theory.uwinnipeg.ca/mod_tech/node80.html
https://www.britannica.com/biography/Sadi-Carnot-French-scientist
https://www.britannica.com/science/Carnot-cycle
http://energyeducation.ca/encyclopedia/Thermal_efficiency
https://www.britannica.com/science/entropy-physics
Çengel, Yunus A., and Michael A. Boles. Thermodynamics: An Engineering Approach. 8th ed., McGraw-Hill Education.

***

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In which John Green teaches you the history of Christianity, from the beginnings of Judaism and the development of monotheism, right up to Paul and how Christianity stormed the Roman Empire in just a few hundred years. Along the way, John will cover Abram/Abraham, the Covenant, the Roman Occupation of Judea, and the birth, life, death and legacy of Jesus of Nazareth. No flame wars! Let's keep the commentary civil.

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http://www.ted.com What's the key to using alternative energy, like solar and wind? Storage -- so we can have power on tap even when the sun's not out and the wind's not blowing. In this accessible, inspiring talk, Donald Sadoway takes to the blackboard to show us the future of large-scale batteries that store renewable energy. As he says: "We need to think about the problem differently. We need to think big. We need to think cheap."

TEDTalks is a daily video podcast of the best talks and performances from the TED Conference, where the world's leading thinkers and doers give the talk of their lives in 18 minutes. Featured speakers have included Al Gore on climate change, Philippe Starck on design, Jill Bolte Taylor on observing her own stroke, Nicholas Negroponte on One Laptop per Child, Jane Goodall on chimpanzees, Bill Gates on malaria and mosquitoes, Pattie Maes on the "Sixth Sense" wearable tech, and "Lost" producer JJ Abrams on the allure of mystery. TED stands for Technology, Entertainment, Design, and TEDTalks cover these topics as well as science, business, development and the arts. Closed captions and translated subtitles in a variety of languages are now available on TED.com, at http://www.ted.com/translate

If you have questions or comments about this or other TED videos, please go to http://support.ted.com

View full lesson: http://ed.ted.com/lessons/is-radiation-dangerous-matt-anticole

When we hear the word radiation, it’s tempting to picture huge explosions and frightening mutations. But that’s not the full story — radiation also applies to rainbows and a doctor examining an X-ray. So what is it, really, and how much should we worry about its effects? Matt Anticole describes the different types of radiation.

Lesson by Matt Anticole, animation by Tinmouse Animation Studio.