Transport CO emissions increased from approximately 257.61 Gg of COe in 2005 to 332.52 Gg of COe in 2010 (Table 3.9). These emissions are lower than estimations of LMS4 and Tongwane et al.6 because of the shorter distance travelled when compared to the values in the latter. The rate of increase of emissions in the transport sector between 2005 and 2010 is approximately 29 percent which is higher than a growth rate of 5 percent between 2000 and 2005. GHG emissions (1.53 Gg) from civil aviation did not increase between 2005 and 2010. Since civil aviation is not a common mode of transport in Lesotho, road transport is generally the sole producer of transport-related GHG emissions in the country. Heavy duty trucks and buses are the main contributors of transport emissions with an average of 47 percent of total annual transport emissions. Two thirds of the total transport emissions in the country are produced by freight vehicles.6 Petrol sales declined between 2006 and 2008 despite the estimated rapid increase of number of vehicles in the country during that period. This is reflected in the emissions of light duty vehicles and motorcars which are predominantly petrol powered. Decrease of petrol sales may have been caused by reduced mobility of these vehicles as a result of high fuel prices which started in 2004. Commuters would usually change their lifestyles by reducing their trips and changing their modes of transport from private vehicles to public transport because of expensive fuels. Figure 3.5 shows an example of the country's common meandering road network.