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.
Many of us may wonder what the exact causes of phlegm in throat are, often considering it to be an underlying problem of a deeper cause. However, phlegm is always present in the body and only becomes a concern when there is an overproduction of it. In such cases, phlegm is also mixed with saliva. 2  In case you are coughing up phlegm that is brown, you may also notice that it is grainy in texture. 3  This means that dust and some other foreign matter are mixed with the phlegm. 4  This is often caused by damage to cilia, which generally happens with COPD patients.