Budesonide-formoterol DPI cuts carbon footprint vs salbutamol MDI

A study in 668 adults asthma patients looked at the carbon footprint of inhalers and found that as needed budesonide-formoterol DPI (e.g. Symbicort) resulted in:
– 95.8% less carbon emission than as-needed salbutamol pMDI (e.g. Ventolin)
– 93.6% less carbon emission than maintenance budesonide DPI + as-needed salbutamol pMDI

Note: this is a rather small study.