How Road Traffic Injuries Affect Household Welfare in Cambodia Using the Millennium Development Goals Benchmarks

This paper reveals the welfare costs of traffic injuries in Cambodia at the beginning of a decade in which greater research and resources will be focused on road safety. The results quantify how road traffic injuries affect progress towards the Millennium Development Goals (MDGs) using survey data from 100 Cambodian households. The median age of the police-reported casualties was 28 years and 68 per cent were male. In terms of poverty (MDG1), injuries resulted in a 21 per cent loss of income for the 542 household residents. The poorest households, and those with a seriously injured resident, were worst affected. Primary education (MDG2) drop-out rates were eight times the province average. The gender (MDG3) income gap widened by 28 per cent, whilewomen bore 88 per cent of the burden of care for the injured. In terms of child health and mortality (MDG4), 31 per cent of respondents reported adeterioration in child health, while 24 per cent of respondents reported a deterioration in maternal health (MDG5). The households reported rates of priority diseases (MDG6) at twice the national average. Environment (MDG7) outcomes included increased wood fuel use and stagnation in improving drinking water access, with no apparent development partnership (MDG8) to address the negative welfare impacts of road traffic injury.     

Salt weathering of sandstone at the Angkor monuments,Cambodia: identification of the origins of salts using sulfur and strontium isotopes

The Angkor monuments in northwestern Cambodia, which are primarily made of sandstone, are suffering from deterioration due to salt weathering. In order to elucidate the sources of the salts and salt weathering process, this paper analyzed bulk chemical compositions and S (sulfur) and Sr (strontium) isotopic ratios for the salts and surrounding environmental materials. At places where bats inhabit the structures, various kinds of sulfate and phosphate salts are formed on the surface of the sandstone. The results of the analysis demonstrate that the S and P (phosphorus) components in the salts are primarily derived from bat guano. Moreover, Ca (calcium), which is the major element in the salts, is suggested to be derived from both bat guano and the sandstone. The isotopic data strongly suggests that bat guano is related to salt weathering. Removal of these animal excrements is essential for future conservation of these monuments. On the other hand, exfoliation of sandstone commonly occurs due to crystallization of calcite (CaCO₃) on platform surfaces of pyramid-type monuments. A large amount of Ca in calcite is suggested to be derived from calcite cement of the building sandstone.