Researchers have found that people exposed to even low levels of air pollution can have changes in the structure of the heart similar to those seen in the early stages of heart failure. For every one extra microgram per cubic metre of PM2.5 -- small particles of air pollution -- and for every 10 extra micrograms per cubic metre of nitrogen dioxide (NO2) the heart enlarges by approximately 1 per cent showed the findings of the Britain-based study published in the journal Circulation. Although our study was observational and hasn't yet shown a causal link we saw significant changes in
