Rome (dpa) - Farm animal manure produces more greenhouse gas emissions than cars. The surprise finding is the result of a report published Wednesday by the Food and Agriculture Organization (FAO). According to the UN agency's Livestock's Long Shadow -Environmental Issues and Options report, the global livestock sector generates more greenhouse gas emissions as measured in CO2 equivalent 18 per cent than transport. It is also a major source of land and water degradation. ``Livestock are one of the most significant contributors to today's most serious environmental problems. Urgent action is required to remedy the situation,'' said Henning Steinfeld, head...