Back in June of 2007, the powers-that-be in Europe officially introduced EURO 5 emissions regulations (.pdf link), and these standards are ... cycles through the EURO 4 requirements in 2012 ...

the RTA has plans to gradually adopt the more strict Euro 4 and 5 standards. How is the air pollution being monitored currently? Currently, the air pollution is monitored through the emission ...

emissions for the clean air zones. The ULEZ standard for passenger cars is Euro 4 (or equivalent) for petrol cars and Euro 6 (or equivalent) for diesels, and it’s important to remember that it ...

Low Emissions Zone (ULEZ) is well-publicised but other cities' Clean Air Zone (CAZ) rules are inconsistent and confusing for motorists. Our guide clears the fog. What is a CAZ? We explain all Find out ...