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https://theconversation.com/this-widely-used-chart-makes-the-clean-energy-switch-seem-much-harder-than-it-actually-is-264322>
"If you follow news about climate change, you’ve probably seen the term
“primary energy”.
This phrase refers to the raw energy in fuels and natural resources – the
energy content of oil in a barrel, gas in a pipeline, or sunlight hitting a
solar panel.
Primary energy is often used to show how much energy humanity uses. The numbers
are staggering — billions of tonnes of coal, oil and gas. When graphed,
zero-emission options such as renewables and nuclear seem tiny and the sheer
bulk of fossil fuels too huge to ever shift. Australia still gets more than 90%
of its primary energy from fossil fuels.
But this is misleading. The reason is that truly enormous amounts of energy
contained in fossil fuels go to waste. As the world goes electric, it will need
much less primary energy for the same result."
Cheers,
*** Xanni ***
--
mailto:xanni@xanadu.net Andrew Pam
http://xanadu.com.au/ Chief Scientist, Xanadu
https://glasswings.com.au/ Partner, Glass Wings
https://sericyb.com.au/ Manager, Serious Cybernetics