redOrbit: The head of the world’s leading farming lobby said on Tuesday that farmers want a special deal in global climate negotiations so they are not saddled with excessive costs for curbing Greenhouse gas emissions. Ajay Vashee, president of the International Federation of Agricultural Producers said that agriculture is responsible for up to 20 percent of global greenhouse gas emissions blamed for global warming, but farmers were limited in how much they could cut emissions. Vashee …