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.
And since there are mucous membranes lining the nose and sinuses, as well as the throat, esophagus, lungs and even the stomach, there's plenty of mucus around to form phlegm. Smokers and people with a cold or lung conditions, such as emphysema or chronic obstructive pulmonary disease, produce more phlegm.