Anyway, these all feel like moot points because I don't believe any of it will make a difference. The COPs have all failed (at least in their stated goals) and there's no reason to expect this next one will do any better. If there's a 'wartime mobilisation' it will be in efforts to expand so-called renewable tech or the US-style 'clean energy' which includes biomass & nuclear, or to double down on bogus carbon off-set schemes - all efforts to prop up the tottering system and provide a few new markets for speculators to invest in while the fossil fuels continue to be mined & burned... King Charles will certainly not be advocating for the kind of environmentalism we actually need - mass transition to sustainable low-impact living with all the economic upheaval and, crucially, land reform that would require. He's a hereditary landowner with massive holdings and investments around the country - people like that don't advocate for policies which threaten their wealth or rent-derived income.
Not that the necessary changes would be any more likely to materialise in a republic...