Intestinal metaplasia is also a common in Barrett esophagus. It this condition it is the esophageal squamous epithelial cells that undergo metaplasia. Approximately, 60% of esophageal cancers diagnosed in the U.S. stem from focal intestinal metaplasia.
Ozone Emission Sources. Emissions contributing to ozone formation come from many areas. The main emission sources categories are: On-road - cars, trucks, and buses. Off-road - aircraft, locomotive,etc. Non-road - construction, agricultural equipment, etc. Point - cement and power plants.
Emissions contributing to ozone formation come from many areas. 1  The main emission sources categories are: 2  On-road - cars, trucks, and buses. 3  Off-road - aircraft, locomotive,etc. 4  Non-road - construction, agricultural equipment, etc. 5  Point - cement and power plants. 6  Area - bakeries, paint shops, dry cleaners, etc.