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.
Phlegm symptoms are commonly caused by bacterial or viral infections of the lungs and upper airways. Healthy lungs are covered with a thin layer of mucus.When threatened by infectious germs or damaging foreign substances, such as smoke or dust, the lungs produce additional mucus.nfectious causes of phlegm symptoms. Phlegm symptoms can be caused by various viral and bacterial infections including: Acute bronchitis (inflammation of the bronchial tubes usually caused by a viral infection or sometimes a bacterial infection). Common cold (viral infection).