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Comment Useless (Score 3, Insightful) 62

I talk to high school teachers all the time, and they tend to be ideologically captured by whatever the next big thing is. There's so much groupthink going on, it's ridiculous. When we complain that students are reaching the workforce without useful skills, teachers love to say, "you see, we're not teaching students the skills that the workforce needs right now... we're teaching them the skills the workforce will need decades from now." This is just a mantra they repeat. So sure, they think AI must be the next big thing and everyone needs to learn it, instead of the fundamental skills that explain how it's all working at the base level.

They're also obsessed with equality to an absolutely absurd degree. One younger teacher we spoke with said, "I don't give homework because it's only the students who are already going well who do the homework, so it doesn't benefit everyone." An older more experienced teacher nearby said, "you understand that we're still going to need doctors in the future, right?" The first teacher looked confused.

Comment Re:Extrapolation (Score 1) 157

I see your comment, and I know that the same error was made several times. There are numerous articles from the last couple of decades, where people point out that the exponential growth of Solar is unsustainable. Here we are in 2025, and the growth still is exponential (and has been since 1992). You have to bring up really good arguments why it should be slowing down anytime soon.

And no, I don't require every city to plaster its roofs with Solar. I just want to point out how much people underestimate the potential of Solar, because they totally underestimate the amount of energy the Sun actually provides.

Lets say, we are able to capture 20% of the Sunlight reaching the ground (actual numbers are more closely to 25%, and research solar cells reach 45%). About 70% of the Sun light is reflected by the Sun's atmosphere. In the temperate climate zone, Sun light hits the ground on average at an angle of about 45. Lets consider rainy days, and about 10% of the Sunlight will be ready for capture, of which we then capture 10%. With the Solar constant being about 1.4 kW, that means that each square meter Solar can capture 14 Watts. A person living in a city needs about 2000 kWh per year (which not only covers domestic use, but also powering the infrastructure), and with a square meter able to catch about 140 Wh per day, each person needs about 20 square meters of Solar to fully cover their energy needs. A city like Houston has a population density of 1600 inhabitants per square kilometer, which means that for each person, there are about 600 square meters of land area in Houston. Only 20 of them are needed to power the city.

Comment Re:Extrapolation (Score 1) 157

The estimates are very rough indeed. If you do the math for any city, you will find out that just the roofs in that city provide enough space for Solar to power the city. It's not that we will run out of space for Solar very soon.

And then, you are projecting linear growth for Solar and Wind, but the actual growth rates are exponential. Roughly every three years, the amount of Solar and Wind installed is doubling - doing so for the last 15 years. In 2027, the World will install 1400 GWp, in 2030, it will be 2800 GWp. Taking your 25% estimate (it's actually more like 17%, but that moves it just into the next year), we will install as much Solar in 2045 year as the total fossil energy output today.

Comment Re:American Express (Score 0) 155

There is quite a difference between Visa and MasterCard (one type), and Amex and Discover (other type). Both Amex and Discover are essentially one-issuer-cards, either backed by American Express or by Discover Financial Services. Visa and MasterCard can be issued by any institution which has a contract with Visa or MasterCard. Visa and MasterCard are Clearing Houses, companies tasked with processing inter-bank-transfers.

Comment 4.3% (Score 5, Interesting) 149

You guys get that 4.3% is low unemployment, right? Something like 90% of the last 30 years have had higher unemployment rate than that. It's the participation rate that's dropping, and that's almost entirely a demographic issue... there are more people retiring every year than graduating. The labor pool, as a percentage of the total population, is falling. This was all known well in advance and has been talked about to death. Those lower 4.3% of the population... the vast majority of them are really difficult to employ. A small percentage of people show up work late, or get drunk before they come to work, or whatever, and it's that group that finds it hard to stay employed.

Comment Re:Get solar panels (Score 1) 120

Yes. Watt peak. And it does, at least for me. Let's say I can get 120 Watts on average over 8 hrs at 300 days/year, this means that I can get 300 kWh a year. If I pay 20 ct/kWh, it will pay back my initial investment of $300 within 5 years.

There is nothing that forbids me to install more than one of those $300/800 Wp systems in general. But I am no longer allowed to just plug them into the next wall socket according to local regulations, and inform my utility after the fact. If I want more than 800 Wp, I have to apply for a larger system, and I have to get it approved. If for instance, I want 10 kWp, I buy 12 of them, costing me $3600, a power management system for maybe $1500, and I need a board certified engineer to approve the setup. At the end, I'll pay maybe $8000 for the whole 10 kW setup, but not $50,000.

Comment Re:Automakers not listening to the market (Score 1) 180

If you're referring to the chargers, I agree. They have a bad reputation currently. But I think a lot of the effort and resources has to go into more generation and distribution infrastructure, which tends to be robust, but expensive and it takes a while. I do think the AI boom is going to leave us with a lot of unused electrical capacity, and I think that's a good think for EVs.

Comment As someone who writes English, not American... (Score 1) 30

...I can see this could be useful for preventing reviews that claim I can't spell or do grammar.

It needs to be opt-in, not opt-out - not only for fear of butchering an author's beautiful sentences, but also because some authors who self-publish in English are successful enough that publishers of books in other languages sometimes pay for the right to publish a translation. Those contracts are usually exclusive, meaning that the author agrees not to let anyone else publish a translation of that book in that language. If Amazon's AI generates one without the author's knowledge, the author could get hit with a breach of contract lawsuit.

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