Question: I read this background article the other day: Carbon dioxide is the most significant long-lived greenhouse gas in Earth's atmosphere. Since the Industrial Revolution anthropogenic emissions – primarily from use of fossil fuels and deforestation – have rapidly increased its concentration in the atmosphere, leading to global warming.  Carbon dioxide also causes ocean acidification because it dissolves in water to form carbonic acid.  I am facing a new situation today: Ben and Andy researched significant greenhouse gasses in Earth's atmosphere. Andy researched more about carbon dioxide, while Ben researched methane gas.  Using the knowledge I acquired from the background article, how should I answer correctly the following question regarding my new situation: Which researcher studied more about the use of fossil fuels?
Answer:
Andy