More than 60 years of scientific study has proven that inhaling small negative ions has positive health benefits. It's also been conclusively shown that air depleted of these ions adversely affects living organisms.

Science broke through the ion curtain back in the 1950's when Professor Felix Gad Sulman* showed that heat stress and respiratory ailments such as asthma, sinus and migraine could be traced to the effects of the so-called 'witches winds', long known to affect human well-being and behaviour.

These winds, such as the 'Sharav', which blows across the deserts of North Africa, the 'Mistral' in France and the strong westerlies and nor' westerlies experienced in Australia, are now known to strip the air of negative ions whilst also producing an overabundance of positive ions.

* Then closely associated with the Bioclimatology Unit, Department of Applied Pharmacology, School of Pharmacy, Hebrew University, Jerusalem, Israel.