► Subscribe to the Financial Times on YouTube: http://bit.ly/FTimeSubs<br /><br />Six European energy companies have asked the UN to draw up a carbon tax. Lex’s Oliver Ralph and Alan Livsey ask why they would do this.<br /><br />► FT Global Economy: http://bit.ly/1J5mmqH<br /><br />► Lex: http://bit.ly/1I14JZF<br /><br />► Olam Chief Calls For Carbon Pricing to Curb Emissions: http://bit.ly/1BsqSOV