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 is produced by your lungs and respiratory system. Your body always produces mucus, but you may notice it most when it changes as a result of a respiratory infection (such as the flu), the common cold, a sinus infection, or allergies. You may also produce more mucus if you smoke. Mucus production is normal and serves many purposes, even when you're healthy.