Copenhagen, Cadbury, Kroger and Kit Kat - this week's top stories had an alliterative ring to them. As the UN Climate Change conference kicked off in the Danish capital, we looked at how the food industry is, in the words of one industry body, "intrinsically linked" to a warming planet. Cadbury will mount its formal defence of the Kraft Foods takeover on Monday (14 December) and this week saw union officials again criticise the prospect of Kraft ownership. Nestle joined Cadbury in the Fairtrade corner with the announcement that Kit Kat would switch to the ethical label in the New Year. And, meanwhile, Kroger, the US retail giant slashed its profit forecast and sent its shares tumbling.