Calf Muscles. 1  The calf muscles are six in number: the gastrocnemius, the soleus, the popliteus, the tibialis posterior, the flexor digitorum longus, and the flexor hallucis longus. 2  The gastrocnemius and the soleus run between the knee and the ankle. 3  One of the calf muscles, the soleus, has a special ability.
Air pollution leads to ozone pollution and acid rain. CFC compounds, used in aerosol sprays prior to 1995, destroy the ozone layer. Ozone pollution can cause damage to human respiratory tracts. Ozone can damage the vascular system of plants.
Ground-level ozone, commonly known as âsmog,â is the major summertime cause of poor air quality in the Bay Area. The Spare the Air Every Day program was created to reduce summertime ozone pollution. Ozone is essentially an unstable molecule made up of three oxygen atoms. It is created in the lower atmosphere by a combination of pollutants called reactive organic compounds and oxides of nitrogen that get âcookedâ by the sunâs ultraviolet rays in a photochemical reaction.