Roedd astudiaeth a wnaed gan Glwstwr y Cymoedd Uchaf wedi dangos bod 90% o anadlyddion yn cael eu hanfon i safleoedd tirlenwi drwy wastraff cartrefi cyffredinol. Drwy hyn, mae modd i'r nwyau hydrofflworocarbon ddianc o'r anadlyddion gan gyfrannu at gynhesu byd-eang.
A study by the Upper Valleys Cluster previously indicated 90% of inhalers were being sent to landfill via general household waste – this can see the HFA gases leak out of the inhalers and contribute to global warming.