Please answer this: Two islands were situated in different oceans. Hill island used fossil fuels and released a lot of carbon dioxide into the atmosphere, while Coral island was very protective towards the air and the ocean. Which island contributed more to an increase in carbon dioxide levels?
++++++++
Answer: Hill

Please answer this: Ben and Andy researched significant greenhouse gasses in Earth's atmosphere. Andy researched more about carbon dioxide, while Ben researched methane gas. Which researcher studied more about the use of fossil fuels?
++++++++
Answer: Andy

Please answer this: Tree city and Leaf city were the two biggest cities in Boulderland. Tree city burned lots of gas and other fossil fuels, while Leaf city was very protective towards its environment. Which city caused more harm to human beings?
++++++++
Answer:
Tree