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.
Some of the major causes of pollution are littering, smoke from factories and trucks, things that could be recycled but aren't, etc.ut common pollution is caused by fumes emitted for factories, cars, burning of fossil fuels; throwing waste on roads, beaches; releasing harmful chemicals into the water bodies, etc. It is caused by people, animals and natural events. Industries or too much smoke in the air or the environment being a mess or disaster.