When it comes to fuel emissions, there are four main exhaust ingredients that have negative effects on health and the environment: nitrogen oxides, particulates, hydrocarbons and carbon monoxide.
For us at Volvo Trucks, manufacturing heavy diesel with these substances vehicles, the main focus is on cutting down nitrogen oxides and particulates. Results have also been good: during the past 20 years, emissions of these substances from new trucks have dropped by 75 and 85 percent respectively, thanks to various technological innovations.
Fuel emission regulations
In order to further improve air quality, exhaust emissions are nowadays strictly regulated in most countries and limits for what each vehicle may emit are constantly being lowered.
The European Union (EU) adopted its standards for new diesel-fuelled trucks in the early 1990s (so called Euro 1 standards) and have now updated them in different steps: Euro 2 in 1996, Euro 3 in 2000, Euro 4 in 2005 and Euro 5 in 2008. In the US, the Environmental Protection Agency (EPA) has announced similar directions. The same also goes for Japan, while Australia and a number of countries in Asia and Latin America are quickly developing along these lines.