Food giants lead call for climate change action

Leading food and drink companies have come together to call for action on climate change, warning that rising temperatures threaten global food supplies.

The heads of Mars, Unilever, Kellogg’s and Nestle are among those who have signed an open letter to world leaders, calling for a “sound agreement” on curbing global warming.

The demand comes ahead of crucial UN talks in Paris in December where countries will meet to try to agree a new global deal to cut greenhouse gas emissions.