Test your knowledge of carbon dioxide and its role in global warming.
Answer questions like ...
- We produce more than 36 billion tons of carbon dioxide per year. Where does the majority of it end up?
- The graph to the left, called the Keeling curve, maps the overall rise in atmospheric carbon dioxide since 1958. But why does it have a zig-zag shape, showing cyclical rises and falls in carbon dioxide levels?
- The average American adds how much carbon dioxide to the atmosphere per year?