Grist, that marvellous online environmental news magazine, has released its list of the world's fifteen greenest cities.

Reykjavik at number one is interesting, as is Curitiba at three even if only because I hadn't previously heard of it (likewise Bahía de Caráquez at nine). But Sydney at 10? The reasons they give are unconvincing, though to be fair Sydney is not that bad in the post-Olympic era.