Ancestors

Toot

Written by Jan Rosenow on 2024-12-06 at 09:51

One type of comment on renewables I get frequently is from people who show primary energy demand.

They say “We will never be able to replace this with renewable energy.”

I tend to differ. Here’s why.👇

https://medium.com/@jan.rosenow/have-we-been-duped-by-the-primary-energy-fallacy-167f53c58961

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Descendants

Written by Bart Champagne ON6BC :debian: on 2024-12-06 at 10:19

@janrosenow

First of all I'd like to state that I'm not here to refute or argue with your hypothesis (even though I have my reservations), just to share my own thoughts and concerns.

Firstly I'm baffled by the vast amount of rejected energy in the diagram (mostly waste heat) and I assume the industry has or will take measures to recuperate the majority of that.

Secondly the amount of natural gas and petroleum going to industry seems way underestimated compared to the other targets.

(cont.d)

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Written by Mayor Gamal Sherif on 2024-12-06 at 16:28

@janrosenow Thank you for this: “In the future, we need to move away from primary energy-based assessments towards metrics that prioritise system efficiency and emissions reductions.” To what extent are passenger #EVs efficient? Their production yields a carbon footprint that exceeds the production of internal combustion engines. Passenger EVs also induce sprawl and investment in carbon-intensive roadways, both of which increase GHG emissions, even if their electricity is photo-voltaic.

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Written by anlomedad on 2024-12-07 at 07:24

@GDS @janrosenow

CO2 well to wheel:

Benzin 3.140 kg / litre

Diesel 3.310 kg / litre

by Auke Hoekstra

https://innovationorigins.com/en/producing-gasoline-and-diesel-emits-more-co2-than-we-thought/

So within a few years, an electric car has amortisized its embedded CO2 compared to obsolete combustion engine.

However, e-cars are not the solution. On the contrary. I think you refer to the other impacts in your reply too: this form of mobility intrudes ever more into land carbon sink and harms biodiversity, it enables suburban sprawl with its high energy cost due to longer distances from A to B, and single family homes = high raw material use, then sealing soil changes hydrological cycle and emissions from land use change come on top of it all.

Not to forget tire ruboff that regularly kills Canadian salmon after heavy rain events with toxic levels of the anti-corosive 6PPD-quinone https://www.science.org/doi/full/10.1126/science.abd6951

And micro plastics from tires in our bodies and brains.

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