WARSAW, Poland (AP) — The European Union's top court says that Poland has violated EU law on air quality by continuously exceeding the bloc's pollution limit from 2007-2015.

Issuing the ruling Thursday, the EU Court of Justice urged Poland's government to speed up efforts to improve air quality and cut the health-threatening levels of particulate matter known as PM10.

It did not impose any fines, but the European Commission may weigh in if Poland does not improve its air quality soon.

In reaction, Poland's government launched a program Thursday limiting the use of coal for heating in private homes.

The ruling was welcomed by environmental organizations, which say the government is too slow in fighting smog, which annually kills some 47,000 people in Poland.