AukeHoekstra Profile picture
Sep 19, 2020 5 tweets 2 min read Read on X
I read it more frequently recently:
bike riding emits more CO2 than an electric car.

And it's true, kind of.
But not really.

If you include the fact that humans have to live an preferably move anyway it becomes untrue. (Short thread.)
First of all, @Mike_Page is right that electric motors are actually more efficient at turning calories into motion than humans. So if we would replace heavy electric trucks with an army of cyclists, this would indeed not be good for the climate and require too much food.
Second of all, I think it's probably true when you compare an electric bike to a car but the 30g/km for a vegan like me is clearly less than for an electric car (~50g/km for manufacturing plus ~40g/km for driving in the EU) and you have to add my CO2 emissions as car driver.
Finally I'm pretty sure the avoided healthcare costs and other societal costs that result from switching from car to bike outweigh the CO2 emissions from biking, both in terms of costs and CO2.
The only thing you could say is that biking is healthy and if that means you live longer, your total CO2 emissions rise. But if you say a person should not bike for that reason I consider you to be 'off the reservation' as they say.

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More from @AukeHoekstra

Apr 14
Five of the Fossil Fuel Industry's Biggest Disinformation Tactics

@guardian article by @WesterveltAmy and @kylepope

Very recognizable for me too, so allow me to summarize the five points and add some observations/examples.
theguardian.com/us-news/2024/a…
1 "FF provides Energy Security"

In reality FF cause(d)(s) many INsecurities.

From the climate crisis, to "Dutch disease", to the end of democracy in Iran, to the war in Ukraine. [My examples]

Renewables are not scarce and last forever.
That sounds more secure to me. Image
2 "You must choose the economy or the environment"

The article gives great examples of this claim.
I hear it daily.

But the reality is that speeding up the transition to renewable SAVES money. Yes, really.

Don't be fooled by their delaying tactics!
cell.com/joule/pdf/S254…
Image
Read 6 tweets
Apr 13
The European Union just came out with an official report:
REAL-WORLD emissions versus the new WLTP cycle.

The results are
*UNBELIEVABLE!!*

PHEVs emit on average
THREE AND A HALF TIMES MORE
than the official test claims!
climate-energy.eea.europa.eu/topics/transpo…
Image
Remember my complaints about @Toyota's misinformation claiming PHEV's are better than full EV's because they need smaller batteries?

Well, @Toyota actually scores WORSE than average with a gap of OVER FOUR TIMES the official value.

(Although their cars are more frugal.) Image
Researchers know since 2012 or so that EU tests are bollox and only useful as an illustration of "regulatory capture".

In my texts explaining how to calculate CO2 emissions I refer to it as "Error 4" (of 6).


sciencedirect.com/science/articl…
researchgate.net/publication/37…
Image
Read 10 tweets
Apr 12
GEOTHERMAL
Just saw a fascinating webinar and you should too if geothermal interests you.


It explains how techniques from fracking are creating a game-changer in the last few years that can reduce the cost of energy systems without fossil fuels.

🧵
Image
The webinar by prof. Roland Horne from @Stanford is about Enhanced Geothermal Systems or EGS that he defines as using fracking to make the area between the infusion and extraction well permeable for water. Image
He focuses on @fervoenergy, a company founded by two @Stanford alumni (one from his program) that has for the first time in history used the horizontal boring technique from fracking in geothermal.
Image
Image
Read 12 tweets
Apr 5
OVERsupply for lithium batteries is looming!

It will bring battery prices down, helping the transition to EVs and clean energy, but create headaches for the lithium industry

Let me give some perspective, showing the long term trend is clear and e.g. @Toyota should be ashamed
🧵
This eviscerates the last credibility of @Toyota regarding EVs.

They (esp. Gill Pratt) have been pushing the story we should buy their hybrids instead of full EVs because lithium batteries are and will stay the bottleneck

BNEF shows that's simply untrue
The energy transition is the largest project in the history of humanity. OFF COURSE there will be some hickups when developing new industries.

But we should stop freaking out anytime some false doom prophet provides clickbait to push their agenda.
Read 10 tweets
Mar 23
How to look at our impact on life on earth in 3 graphs:

1) Humans are just 0.01% of all biomass. (The graph is gorgeous!)

2) Humans + domesticated animals have almost completely displaced wild mammals.

3) We use 45% of habitable land for agriculture.
I *love* how well this graph was designed and how well it shows how small we are in the grand scheme of things.

Fun facts:
- Life is 0.00001% of the earth by weight
- Earth is 0.0003% of the weight of the sun

So we are insignificant right?
Well...
weforum.org/agenda/2021/08…
If we look at the mammals at the top of the food chain the opposite is true: we have completely taken over.
(ht@bennettpeer - other source unknown) Image
Read 5 tweets
Mar 16
Grid congestion is THE bottleneck for economic growth and sustainability in the Netherlands.

But it doesn't have to be!

When we combine Dynamic Line Rating with Peak Shaving we could move three times more electricity with the current grid!
🧵 Image
What is Peak Shaving?

Peak shaving means that you take measures to lower the peaks in electricity usage. Peaks are what limits use of a power line. In the example graph below you can see the demand is too high a few yours per week. But there is more than enough capacity overall Image
Adjusting only the 2.5% of electricity demand that causes the biggest peaks adds 25% of capacity.

Removing 17% of energy from the peaks (e.g. with dynamic pricing, batteries, smart charging, etc. etc.) provides 50% more capacity.

But now we add dynamic line rating! Image
Read 15 tweets

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