Stars twice the size of the Sun produced the majority of carbon in the Milky Way

Astronomers from the US and UK including the University of Warwick, studied star clusters throughout the Milky Way to track down the main sources of carbon. https://www.dailymail.co.uk/sciencetech/article-8529239/Stars-twice-size-Sun-produced-majority-carbon-Milky-Way.html?ns_mchannel=rss&ns_campaign=1490&ito=1490