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.
What is the primary cause for the thinning of the ozone layer? the breakdown of ozone molecules due to a chemical reaction with free chlorine in the atmosphere What are the main risks of indoor air pollution in developing countries? Biomass and coal are burned in open pit fires without the right fuel to air ratio, which causes incomplete combustion.