Please note: NI did not receive permission to reproduce the artwork on-line, so please subscribe to the paper edition to see the illustrations.

If you think the threat of global warming should be taken seriously, then you will probably view a cartoon competition on the subject as in poor taste – a bit like making jokes about concentration camps. You would be rapidly disabused of that attitude if you could see the 200 cartoons from around the world that were entered in the Biennial Ken Sprague International Cartoon Competition ‘Earthworks 2008’.