Business Green: Chinese prime minister Wen Jiabao yesterday announced plans to increase spending on clean technology and bolster agricultural output, as part of a plan to cut carbon emissions while simultaneously preparing for the potential impact of climate change on food yields. Speaking in his annual budget address, Wen said spending on the science and technology sector would increase 25.6 per cent on 2008 levels to 146.1bn yuan (£15.1bn) with extra funding assigned to wind, solar, nuclear, and …