Effects of Photochemical Smog. Photochemical smog's effects cause damage to the respiratory system and environmental systems with the release of nitrogen oxide (NO), ozone and volatile organic compounds (VOCs). These effects are worse when the sun is highest because the pollutants react with it.
This cut is called a flank steak because it literally comes from the flank of the cow â its side, below the ribs. It's a fairly wide and thin cut; it's only 1 to 1 1/2 inches at its thickest and it becomes even thinner toward one end.
Flank Cuts. Flank steak is a relatively lean cut of beef. For less than 165 calories, you can have a 3-ounce broiled flank steak. The biggest percentage of those calories, or 60 percent of calories, are from protein. This serving of flank steak has close to 100 calories from protein.