Which of the following scenarios is MOST likely to occur if atmospheric carbon dioxide levels continue to rise?
A - Global temperatures will increase, glaciers and polar icecaps will melt, and many species will go extinct, but many will also adapt and survive, and some new species will evolve to take advantage of the new niches created by the climate changes.
B - Global temperatures will increase, glaciers and polar icecaps will melt, and even more carbon dioxide will be released from the deep ocean. The higher levels of carbon dioxide will become toxic to humans and other mammals, and new organisms that are more adapted to higher carbon dioxide levels will evolve to take their place.
C - Global temperatures will increase, and glaciers and polar icecaps will melt, causing sea levels to rise. Plant life all around the Earth will die off because of high temperatures and lack of sufficient fresh water.
D - Global temperatures will increase, glaciers and polar icecaps will melt, the Earth will revert back to the way it was during the Mesozoic period, and dinosaurs will evolve again in this type of environment.
Answer: A - Global temperatures will increase, glaciers and polar icecaps will melt, and many species will go extinct, but many will also adapt and survive, and some new species will evolve to take advantage of the new niches created by the climate changes.