Smog alert remains in effect for Moravia-Silesia region

A smog alert remains in effect for parts of the Moravia-Silesia region in the northeast of the country, the Czech Hydrometeorological Institute said. The alert was declared on Wednesday over dust emission values that in some places twice exceed the permitted limits; the highest levels of pollution have been registered in the Karviná district, with 242 micrograms per cubic metre. The situation is not likely to improve on Thursday, meteorologists said. The Ostrava region is one of the most polluted in the country, with heavy industry, traffic and home heating among the major factors.