Amend the header of the column &quot; Mass of particulate matter(1) (PM) &quot; to read &quot; Mass of particulate matter (PM) &quot; , and
Modifier l &apos; en-tête de colonne &lt; &lt; Masse de particules1 (PM) &gt; &gt; comme suit: &lt; &lt; Masse de particules (PM) &gt; &gt; ;