U.S. energy consumption rose slightly in 2016 despite a significant decline in coal use. consumption/demandnatural gasoil/petroleumrenewables. Total U.S. energy production falls in 2016 after six consecutive years of increases. crude oilnatural gasnuclearpetroleum productsproduction/supplyrenewablestotal energy.
What Causes Throat Mucus & Phlegm? Post Nasal Drip:Post nasal drip occurs when an excessive amount of mucus accumulation in the nose and throat creates phlegm and causes coughing. Cold or Flu: During a cold or the flu, there is a production of clear, thin mucus in the nose and back of the throat.
Coughing Up Yellow Phlegm. Infections, allergies or asthma can lead to an inflammation of respiratory tract and lead to an accumulation of inflammatory cells or leukocytes in mucus. This can cause phlegm to turn yellow. Thick yellow phlegm is a sure sign of a bacterial or viral infection.