If you've been collecting temperature and CO₂ data you'll notice that it's changing over time in Whyville. What's causing the changes?

Does simply moving around Whyville affect its climate? How about chatting? Does this affect temperature and CO₂ levels? While nearly everything that citizens do can have an effect on climate, certain activities contribute to climate change more than others.

On the graphs you can view either temperature or CO₂ levels along the Y-axis and time is plotted along the X-axis. CO₂ is described in ppm, that's parts per million, and temperature is described in degrees Fahrenheit. When you look at the graphs, consider if there are any patterns or trends that you see. Use the drop-down menus to choose what data you'd like to view and think about how events in Whyville's history might have affected the points on the graph. You can visit the Whyville Times archives to find historical information. Then, post your thoughts in the BBS below.

1. Do each of the graphs follow a general pattern? If you think they do, describe what that general pattern for each graph is.


2. Do you notice any spikes or points in the graphs where the data jumps extra high? If you do, what changes in Whyville might have caused these? Hint: search the Whytimes archives for clues.


3. The level of CO₂ in the Earth's atmosphere has been rising over the past few decades. Why do you feel this is happening?


4. The Earth's average temperature has been rising over the past few decades, as well. Why do you think that is?


5. What are some ways that businesses could help reduce their carbon emissions?


6. What effect do you feel the human population growth has on the Earth's atmosphere? What can cities and countries do to support population growth while supporting the environment?