Imagine that you are a scientist studying global warming. You’ve been asked to speculate whether we are in the midst of a period of global warming. How could you tell whether
we are in a period of global warming? (Hint: What did you learn about carbon dioxide
levels during the Ice Age?) What effect do you think any environmental change will
have on animals living today? Do you think we should try to stop global warming? If
so, what should we do?