How air pollution is linked to heart disease: http://t.co/241X4A5akE pic.twitter.com/no3UELOBn6 — Cleveland Clinic (@ClevelandClinic) October 7, 2014 Small particulates and long-term risk Air pollution can contain large or small particles of dirt or contaminants. Small particulate matter (defined as particles that have a diameter smaller than 2.5 micrometers) is especiallyContinue Reading