Pollution like the smoke seen at this garbage dump in Pakistan ispart of an ongoing polycrisisARIF ALI/AFP via Getty ImagesA Climate of TruthMike Berners-Lee (Cambridge University Press UK: On sale now US: On sale from 10 April)Mike Berners-Lee admits he is worried about getting bad reviews for his new book, which criticises sections of the UK media for having editorial agendas effectively set by their owners. In the readable but dispiriting A Climate of Truth: Why we need it and how to get it, he points the finger at the BBC, Rupert Murdochs empire, the