Those aren't purely technological solutions though (except in the loosest sense of the word, where any non-hunter-gatherer behavior a human engages in is a technology), as they involve changing the way people live.

The electric car is a mostly drop-in replacement that fits in fine with the existing car centric suburban development model. The transit, cycling, and pedestrian oriented city involves changing how people think about their lives (many people in the US ask how it's even possible to get groceries without a car) and even changing some of the ways we structure our society (the expectation that the cost of housing will increase forever, or even the expectation that housing should be treated as a commodity to invest in at all, as well as many other things to do with the intersection of finance and landuse).

To give another example inventing new chemical processes to try to make plastic recycling work is a technological solution to the problem of petroleum use and plastic waste. Reducing or eliminating the use of single-use plastics where practicable is a non-technological solution, because it doesn't involve any new technologies.

In principle I'm not opposed to new technologies and "technological solutions". However you can see from the above examples that very often the non-technological solution works better. Technological solutions are also very often a poison pill (plastic recycling was made to save the plastic industry, not the planet).

In practice I think we need to use both types of solutions (for example, massively reduce our plastic use, but also use bio-plastics anywhere we can't). But people have a strong reaction to the idea of so-called technological solutions because of the chilling effect they have on policy changes. We saw this with the loop and hyperloop. Rather than rethinking the policies that lead to the dearth of High-Speed rail in the US and investing in a technology that already existed a bunch of states decided to wait for the latest whizz-bang gadget to come out. And it turns out this was exactly the plan. The hyperloop was never supposed to work, it was just supposed to discourage investment in rail projects.

Some bad things take a very long time to show up though; the idea of putting the brakes on any new development until we had complete knowledge of potential bad things resulting simply isn't practical.

Lets take a really basic example: chlorofluorocarbons (CFCs). Ammonia was--and is--used a refrigerant. It was the first one that really worked, and many large-scale industrial systems still use it. It's cheap, it's very effective, and it's environmentally friendly. Unfortunately, ammonia has two problems: first, it's highly reactive with copper, so you can't have any copper in your system, and second, a leak in a refrigeration system can kill you because ammonia gas is toxic. A number of industrial accidents in the 1920s that resulted in a lot of deaths led to the search for non-toxic refrigerants. Enter CFCs; unlike ammonia, sulfur dioxide, and other early refrigerants, they're non-toxic, so a leak in your refrigerator (or the air conditioner in your car!) does risk killing you.

...Except that CFCs absolutely wreak hell on the ozone layer. They were eventually banned. HCFCs were used for a while, because those tend to break down before they get to the ozone layer, but it turns out that if they do get up there, they do more damage than the CFCs they replaced.

But we didn't know that in the 1920s. Hell, I don't think we realized that was a significant problem for 40-50 years after CFCs were in common usage. In that time, food had gotten considerably safer, because refrigerators had become common, and were now in ever home. Without CFCs, we might have never gotten to the point of refrigeration being in common usage in homes. (For reference, the house I had in Chicago was built in the 20s, and had a bricked-over window that went into the pantry. That window used to be where blocks of ice were delivered daily or weekly to an ice box.)

We're still looking for alternative refrigerants--and insulating blowing agents--that are both non-toxic, environmentally friendly, and are can be made cheaply enough to realistically replace the current generation of refrigerants.

There around 1000 life cycle cost analyses that disprove this idea by now. It takes only a few years of driving electric to pay off the carbon debt from manufacturing, assuming average driving behavior.

Of course, this is complicated because we should be dramatically reducing driving. But for most people it does not make sense to keep a gas car as a daily driver.

Replacing a gas car with an electric car would only be worse than running your current gas car into the ground, if you were buying a brand new EV and were junking your old gas car. A lot of people won’t do that. If you buy a used EV and sell/trade-in the gas car to someone else to use, a new EV isn’t built and someone who can’t afford EV can get your used car.

Obviously pedestrian infrastructure and public transit is preferable if viable, but it isn’t always viable for the average person (at least in the USA/Canada) to switch to those, so having both options is best

So is "AI", what is your point? Some are great, some are an absurd waste of resources.

Oh, and I thought they made carbon capture viable (assuming clean energy). Meh

Multiple wealthy countries have put incentives in place to encourage increased birth rates, all have failed. Other than forcibly inseminating women there's not much they could do.

It doesn't matter what is "allowed," people in highly developed countries, especially ones with low immigration, are experiencing freefalling birth rates that are already well below the replacement rate, and governments are BEGGING women to have more babies. See South Korea, China, and Japan