China's emissions are primarily based on industry, not individuals, hence GDP.

Nope. As of 2024, China is only 37% behind the US per capita. And China's per capita is on a very strong upwards trend.

US emissions have declined 13% while China's has increased 38%. That's a result industry not individuals.

Coal has still not been replaced. It is still being used as fast as they can mine or import it.

"[26 March 2026] Despite being a renewables superpower, China continues to permit and build new coal-fired power plants at a rapid pace. Analysts say the nation’s new five-year plan will ensure further coal plant expansion and jeopardize China’s ability to deliver on its climate promises.
In 2021, China’s leader Xi Jinping made two important promises intended to signal China‘s commitment to fighting climate change. At the Leaders Climate Summit in that April, he announced that China would “strictly control” coal generation until 2025 when it would start to gradually phase it out. He also pledged that year that China would reduce the energy intensity of its economy — the amount of CO2 used to produce a unit of GDP — to 65 percent below 2005 levels by 2030. This month, as China unveiled its plans for the next five years, both promises appeared to be in trouble.
The 15th Five-Year Plan offered a chance to correct these negative trends and get China’s climate ambitions back on track, but it is an opportunity the government appears to have missed ... Instead, they changed the way they calculate energy intensity, perhaps to disguise the failure to meet Xi’s target, and set a looser ambition for the next five years. "
https://e360.yale.edu/features...

"[21 August 2025] Coal-power capacity could surge by as much as 80-100GW this year, potentially setting a new annual record, even as coal-fired electricity generation declines." "A former senior official at one of China’s largest power firms stated in an interview in June 2025 that companies are building coal power capacity due to central government pressure."
"The use of coal to make synthetic fuels and chemicals is growing rapidly, climbing 20% in the first half of the year and helping add 3% to China’s CO2 since 2020. The coal-chemical industry is planning further expansion, which could add another 2% to China’s CO2 by 2029, making the 2030 deadline for peaking harder to meet."
"Excess coal-based capacity and a lack of incentives for shifting production mean that electric arc steelmakers, rather than coal-based steel mills, tend to absorb reductions in output, as their operating costs are higher and costs of shutting down and starting up production lines are lower."
"Even if its emissions fall in 2025 as expected, however, China is bound to miss multiple important climate targets this year. This includes targets to reduce its carbon intensity – the emissions per unit of GDP – to strictly control coal consumption growth and new coal-power capacity,"
https://www.carbonbrief.org/an...

They are still using all the coal they can mine or import. Renewables are not replacing coal. The percentage of renewable used is increasing because renewables are growing faster than coal is growing.

That's not the issue. It's the cost of fossil fuels. The cost of fulfilling the gap between renewables and demand. China chooses coal for that.

It is in China, they build new coal plant instead of natural gas plants. They don't care about emission, they care about low cost.

Actually China is all in on domestic coal usage, the US is exporting, US industry continues to move to cleaner fossil fuels like natural gas when gaps need to be rilled between renewables and demand. Unlike China which is coal first seems to be planning to stay that way.

"[26 March 2026] Despite being a renewables superpower, China continues to permit and build new coal-fired power plants at a rapid pace. Analysts say the nation’s new five-year plan will ensure further coal plant expansion and jeopardize China’s ability to deliver on its climate promises.
In 2021, China’s leader Xi Jinping made two important promises intended to signal China‘s commitment to fighting climate change. At the Leaders Climate Summit in that April, he announced that China would “strictly control” coal generation until 2025 when it would start to gradually phase it out. He also pledged that year that China would reduce the energy intensity of its economy — the amount of CO2 used to produce a unit of GDP — to 65 percent below 2005 levels by 2030. This month, as China unveiled its plans for the next five years, both promises appeared to be in trouble.
The 15th Five-Year Plan offered a chance to correct these negative trends and get China’s climate ambitions back on track, but it is an opportunity the government appears to have missed ... Instead, they changed the way they calculate energy intensity, perhaps to disguise the failure to meet Xi’s target, and set a looser ambition for the next five years. "
https://e360.yale.edu/features...

We'll see when the final number for 2025 are in. The fact remains the emission could be so much lower if China would choose less polluting fossil fuels to fill the gap between renewables and demand.

And when do they start capturing eye movements? They surely want to collect as many "performance metrics" as they can.

LOL. That's believable, especially at Meta.

And besides, isn't the goal of the model training to have AI agents "move fast and break things"?

The fact remains that the resurgence in the US coal industry is exports based.

The EU use of coal was never anything more than an emergency stop gap measure. It would take time to replace RU oil and natural gas with other sources of oil and natural gas. One of those sources being the US.

Ah, the per capita myth.

Per capita is the wrong metric. China's pollution is overwhelmingly industrial based. The behavior of individuals is not meaningful. The proper metric is per GDP, and China pollute far more than the US per GDP.

I use terminal, just like under Linux, but from Google:

Yes, Xcode has built-in support for performing Git diffs, allowing you to compare your current working code against previous commits or other branches.

Core Diff Methods in Xcode
Comparison Mode: Use the Version Editor (often triggered by a button with two arrows or by selecting View > Show Code Review) to see a side-by-side or inline comparison of your current changes against the last commit.
Commit Window Diff: Before you finalize a commit (Source Control > Commit), Xcode opens a staging area that highlights exactly what has changed in every file since the last snapshot.
Gutter Indicators: Xcode marks modified lines in the source editor with blue bars in the gutter. Clicking these bars allows you to "Show Change," which displays the previous version of those specific lines in a pop-up.
History/Log View: In the Source Control Navigator, you can select any past commit to view a detailed diff of all files modified in that specific revision.

Specialized Tools
FileMerge: Included with Xcode, this standalone tool can be used for complex merges and manual file-to-file comparisons outside of the project structure. You can launch it via Xcode > Open Developer Tool > FileMerge.
Terminal Integration: Since Xcode installs the command-line version of Git, you can always run git diff in the macOS Terminal for standard text-based output.

Coal is the lowest cost fossil fuel. That is why China is not replacing coal with solar. Solar is supplementing coal, not replacing it.

Because China and the world would be better off if renewables were replacing coal. If when China had to use fossil fuels to make up the gap between renewable and demand they used something cleaner like natural gas. China unnecessarily chooses to maximize its pollution. It could do so much better, but it prefers lowest cost where fossil fuels have to be used, ie coal.

Yes, that is what I was referring to. And years ago is when US coal exports to the EU shot up.

FWIW the 2020 M1 is ahead on GPU.

Oh, I am not criticizing it for 2020 M1 like performance. I recently got a 2020 M1 for low end testing purposes, an 8GB system. I have been absolutely shocked at how well it performs at day-to-day tasks. It's not troublesome at all until doing development under Xcode. All the sorts of things student and typical users would do are surprisingly (to me) doing well even at 8GB under macOS 26.

My criticism is that the 2020 M1 seems the better deal. Larger screen, faster UI, backlit keys, etc. The Neo being on par with this lowest end Apple Silicon based Mac ever made because that is good enough for the education market and deters those who would normally go Air. I expect it will do well for K-12 students. Even some college students.

He can say whatever he wants, but US industry has been replacing coal with cleaner sources for decades. The fossil fuel growth in the USA is really natural gas.

The resurgence of the coal industry is mainly due to exports. It turns out the EU's plan of Russian oil and natural gas wasn't such a good idea.

Apologies for the mixed

Ars seems to be talking about growth of emissions not absolute emissions.

But those renewable are not displacing the dirtiest energy first. They could be reducing pollution if they targeted coal first, not merely slower the growth of their pollution.