'Climate' is an old idea, but an idea which retains tremendous power, versatility and utility in today's world. For the Ancient Greeks, climate worked both as index and as agency, and this dual function has recurred throughout human cultural history and it works too in contemporary discourses about climate change. Climates change physically, but climates can also change ideologically. What climate means to different people in different places in different eras is not stable. If culture is concerned with how human meaning, symbolism and practice take on substantive and material forms,...