I can’t offer any comparison between the Us and the UK, but I have some experience of having a neurodivergent child in the UK. We live in the NE of England, an area which is on average pretty deprived by UK standards*, however the support from the primary and secondary state schools we have used has been exceptional, with additional staffing as required and sensitive adaptions to needs throughout. There was some bullying at one point in primary school, but that was dealt with promptly and effectively and strategies were put in place to avoid social isolation - things it would never have occurred to me to do. The support for LGBTQ kids in secondary has also been pleasantly surprising - to the point that those who try to pick on trans kids find themselves becoming persona non grata pretty quickly.

There are some pretty huge cultural differences between the UK and the US, as you will know, and I suspect adjusting to those are going to be the primary problem in the move, rather than the support for a neurodivergent or SEN child.

*I feel like I should stand up for my adopted North-East; whilst it’s true that there are deprived areas, the NE is a beautiful place, the people are friendly and welcoming and the cost of living is low compared to many areas. The accents are proper canny too!

Yeah, it’s been pretty universal in the UK for at least the last couple of years. Not sure where this idea came from.

You are right that you need to dehumidify a large volume of air (like, more than 150 cubic metres) to get enough water for a person, in a rationing scenario. That isn’t necessarily a huge problem; fans can move large volumes of air quite efficiently and dehumidifiers work more efficiently at higher temperatures, but your main point that it isn’t scalable on a population level is definitely true - it’s something you can do for off grid or survival situations, but not easily for domestic water supply.

That’s 17g or 17cc per cubic metre, not 17 litres!

In dry countries the relative humidity can be low - sub 40% is common. That said, the absolute water carrying capacity increases rapidly with temperature, so at 40C, the saturation mass is more like 50g/m3 and at 40%RH it still carries more water than 100%RH air at 20C.