I used to use this statistic all the time http://www.unleashed.org.au/change_the_world/go_veg/environment.php
however apparently it isn't accurate.. ignoring the fact that this is on meat and live stock australia's website they have evidence to back up their reasoning as to why it's wrong...
according to http://www.redmeatgreenfacts.com.au/Myth-Bust
"Livestock produce more emissions than the whole of the transport sector combined"
Fact This commonly quoted figure originated from the 2006 United Nations Food and Agricultural Organization (FAO) report, Livestock's Long Shadow. A subsequent 2010 review of this report by scientists from the University of California Davis found that the FAO paper used two different methodologies to calculate greenhouse gas emissions and resulted in an unfair comparison.
Following this paper one of the initial authors of the FAO report, Livestock Policy Officer Pierre Gerber, told BBC News he accepted the criticism.
"I must say honestly that he [Professor Mitloehner, UC Davis] has a point; we factored in everything for meat emissions, and we didn't do the same thing with transport".
In Australia, energy generation represents 37 per cent of Australia's emissions, compared to 10 per cent for livestock.