Greenhouse gas. A greenhouse gas (abbrev. GHG) is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. This process is the fundamental cause of the greenhouse effect. The primary greenhouse gases in Earth's atmosphere are water vapor, carbon dioxide, methane, nitrous oxide, and ozone.
A musician is a person who plays a musical instrument like a guitar or a piano or a person that sings. A musician is also someone who writes music, even if they write it for other people to play. People who write music are called composers. Usually that part is left out if they also play or sing the music they write, but they are still composers because they wrote the music.
A songwriter is an individual who writes the lyrics, melodies and chord progressions for songs, typically for a popular music genre such as pop music or country music. A songwriter can also be called a composer, although the latter term tends to be mainly used for individuals from the classical music genre.The pressure from the music industry to produce popular hits means that songwriting is often an activity for which the task are distributed between a number of people.or example, a songwriter who excels at writing lyrics might be paired with a songwriter for a gift for creating original melodies. Pop songs may be written by group members from the band or by staff writers: songwriters directly employed by music publishers.