"Some believe a narrow focus on climate is justified - either because they feel it is so much more serious than every other issue, or because they feel there is real political momentum to solve it now and time enough to deal with everything else once that is done.

But others argue there is no time; that society needs, urgently, to see the wider picture of global decline in all its complexity - and that climate concerns have hijacked the broader agenda, to the detriment of us all."