Agence France-Presse: The British government said Monday it would slow the expansion of biofuels following a report which found they could increase greenhouse gas emissions and contribute to food price rises. Transport Secretary Ruth Kelly said a review had not recommended a temporary halt to the use of biofuels, which are sourced from organic materials such as palm oil and sugar beet. But she said that while biofuels had the potential to cut carbon emissions there were “increasing …