Let's begin with the severe air conditions across the country. <br />Ultra fine dust levels are high nationwide today,... with some regions under fine dust advisories, including the capital Seoul.<br />Children, elderly citizens and those with respiratory issues are advised to stay at home,... and when going outside, people are recommended to wear face masks.<br />Experts say stagnant air has led to the heavy dust levels. <br />The fine dust concentration is expected to fall slightly on Sunday. <br />