It makes me sad when people dismiss Art Nouveau as being "for the rich" while acting as if things aren't really Solarpunk unless they're gritty or recycled looking. People act as if pretty things are only for the wealthy – which is just what the wealthy want you to believe.
Art Nouveau is perfect for the Solarpunk movement, and not just because of the plant-based themes. It's deeper than that.
Art Nouveau was an inherently anti-capitalist movement.