Road-transport vehicles are an important source of both air pollutants and climate-destabilising greenhouse gases. There is clear evidence of the harmful impact on human health of exposure to vehicle pollutants. As a result, local air quality has become a major policy issue in almost all countries. Most industrialised countries have made substantial progress in reducing pollution caused by cars and trucks through improvements in fuel economy, fuel quality and the installation of emission-control equipment in vehicles. Increasingly, these improvements have been driven by emission standards. However, rising road traffic has offset in most countries at least part of the improvements in vehicle-emissions performance. Less progress has been made in developing countries, where local pollution in many major cities and towns has reached catastrophic proportions.
LPG systems for vehicles are not only evident cost savings. They also mean care for health and the natural environment, as well as reduced emissions of harmful substances in fumes (carbon dioxide approx. 15%, carbon oxide approx. 20 %, nitric oxides, hydrocarbons approx. 50 %), elimination of harmful benzene, lead compounds and sulfates from the fumes and delayed climatic impact caused by environmental pollution.