[AstralStorm]

Unfortunately walls are the major way houses get hot. You could use something with big thermal capacity but it's expensive and heavy. AC or evaporative cooling cannot be avoided, but can be made more efficient.

Increased transit time for ships is from month to many months. Not worth it.

Veganism faces a big problem with water use.

Agriculture is being looked into all the time, but cheap always wins. We need to feed these billions of people somehow, and crop rotation won't do.

Mandating greenwashing is what we have now. The area to cover with renewables to power just a single smelter is huge.

[bryanlarsen]

> The area to cover with renewables to power just a single smelter is huge.

That would be an issue only if that prevented the land from being used for other things. Wind power generation doesn't prevent farming on the land or prevent fishing on the ocean. Solar can be deployed on rooftops or parking lots. Solar developments often support grazing animals underneath the solar panels.

[bleepblorp]

The offshore wind farms I have seen photos of have the individual wind turbines packed too closely together to safely navigate a fishing boat between them.

Fish are not uniformly distributed, however, so the fishing impacts of offshore wind farms can probably be reduced by not installing wind farms in fishing grounds.