The European Commission said it sent a letter of formal notice to Greece on Wednesday over its failure to produce a national plan to control air pollution.
Member-states are required under EU directives to draw up and implement programs to limit their annual emissions. They had until April 1, 2019 to present the plan to the EU.
The EU's industrial output in 2019 slipped 1.1 percent compared to previous year, the bloc's statistical office reported on Feb. 12.
Eurostat said the figure was also down 1.7 percent in Eurozone during the same period.
The eurozone/euro area or EA19 represents member states that use the single currency -- euro -- while the EU27 includes all member countries of the bloc.
Greek Foreign Minister Nikos Dendias (left) and his Spanish counterpart, Arancha Gonzalez Laya (right), give a press conference following talks in Madrid on Monday. The officials agreed to "expand coordination in the context of the European Union, during the debate on reform of the Union's rules on asylum and on migration in general," Dendias said.
Greek Foreign Minister Nikos Dendias is visiting Malta on Wednesday for talks with the country's President George Vella as well as with European and Foreign Affairs Minister Evarist Bartolo.
Talks were to focus on issues of bilateral interest, including migration and ongoing regional developments, the Greek foreign ministry said.