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.
Causes of Ozone Hole. The destruction of ozone layer is caused by one factor only which is Cholorofluorocarbons. The main cause of the ozone hole was found to be gases that contained Cholorofluorocarbons (CFCs), Halons and Freons.Found commonly in aerosol cans and released by many electronic appliances, these were seen to decrease the level of ozone in the stratosphere.t was noticed that there was a steady decline of the ozone in the stratosphere, which comprised of the ozone layer. They also noticed ozone depletion in larger amounts over the two poles of the earth, which is known as the ozone hole. A layer of gas called ozone sits up around 25-30 kms above the earthâs surface.