But, as regards impurities in the air, it would be necessary that exceptions to the strict standards would only apply when the party incinerating the waste can truly demonstrate that no more emissions are being released into the air than what the licensing conditions allow.
For en formindskelse af de luftforurenende stoffer er det dog nødvendigt, at undtagelser fra de stramme standarder kun gennemføres, hvis affaldsforbrænderen virkelig kan bevise, at der ikke slipper større emissioner ud i luften, end godkendelsesbetingelserne tillader.