Particulate matter 2.5, one of the air pollutants which is known to worsen health conditions like asthma, heart attack among others, has also been found to be a reason behind declining memory in older women. A new study has presented that women in their 70s and 80s who were exposed to higher levels of air pollution experienced greater declines in memory and more Alzheimer's-like brain atrophy than their counterparts who breathed cleaner air. The findings of this study were published in the journal Brain. This is the first study to really show, in a statistical model, that air pollution was associated with