The Louisville Metro Air Pollution Control District and the Indiana Department of Enironmental Management have issued an Air Quality Alert for today. A code Orange alert is in effect from 8 AM EDT until Midnight tonight. Members of sensitive groups may experience health effects. Sensitive groups include the elderly, children, persons with asthma or other breathing problems, and persons with lung and heart disease. People in these groups are advised to greatly limit their outdoor activities to reduce their exposure to ozone and particulate pollution.