Smokers inhale more tar, nicotine and carbon monoxide when measured with WHO method RIVM has measured the amount of tar, nicotine and carbon monoxide (TNCO) in all filter cigarettes sold in the Netherlands with the WHO Intense method.
Mercury in Groningen’s natural gas not harmful to health Mercury can be naturally present in natural gas. This mercury can end up in your home, especially if you use a natural gas cooker. In 2014, the Nederlandse Aardolie Maatschappij (NAM) calculated exposure to mercury at daily peak moments.