Here is the 1st para of the CSIRO Report executive summary-
"This report examines available information on low and ultra-low sulfur diesel and alternative fuels for heavy vehicles in terms of their emissions of greenhouse gases and air pollutants. Most of this information is from overseas, and has been used to estimate emissions for heavy vehicles using such fuels in Australia. This is done within a life-cycle framework that considers both the pre-combustion emissions and the tailpipe emissions during combustion. This approach is sometimes called the full fuel-cycle or the “well-to-wheel” emissions (even though the raw materials for biofuels do not come from wells) and considers the chain of feedstock production, feedstock transportation, fuel production, fuel distribution and, finally, vehicle use."