While regulations on greenhouse gas emissions were adopted in 1970, the first EU standard, known as Euro 1, was introduced in 1992. In fact, according to this standard, catalytic changes in new cars made and sold in the UK became mandatory, because Europe needed to reduce greenhouse gas emissions and standard fuel with lower emissions should be used in new cars. Since then, many standards have been set for emissions, the most recent of which was approved in September 2014 and became mandatory for all automakers in September 2015. These regulations, which have become even stricter over time, impose acceptable restrictions on the emission of gases into the European Union and the EEA (European Economic Area)
According to the European Union, the emission of pollutants by the transportation system plays a significant role in air pollution, so the purpose of setting emission standards is to reduce the emissions of harmful pollutants such as nitrous oxide (NOx), carbon monoxide (CO), and hydrocarbons. HCs and solid particles (PM). Today, these standards, with the help of the SMMT Association of Motor Manufacturers and Car Dealers, have a positive impact on air pollution, and SMMT claims that every 50 cars produced today will produce as much pollution as a car produced in the 1970s. Used to prove his claim:
But because diesel and gasoline engines produce different pollutants, there are different standards for them, for example, diesel fuel produces more particles or soot, which leads to the introduction of diesel particle filters (DPFs), but still despite the situation. By such standards, the European Union has stated that nitrogen oxide emissions from transportation have not been reduced to the expected level, while the UK government stated in December 2016 that road transport accounted for 34% of greenhouse gas emissions. Allocated as well as reducing the release of nitrogen oxide due to a Road vehicles are growing more and more slowly. Also, the average emission of carbon dioxide by new vehicles has more than doubled.
Euro 4 (EC2005)
Execution date (new sold cars): January 1, 2005
Execution date (all new registered cars): January 1, 2006
Euro 4 emission standards (gasoline)
Carbon monoxide: 1.0g / km
Hydrocarbons: 0.10g / km
Nitrogen oxide: 0.08g / km