What causes this? Is it natural? What effect will it have?
Does the fact that scientists don't all agree about the causes of the changes we're seeing make you skeptical of their predictions and recommendations?
Could we just adapt to whatever changes global warming might bring, without doing anything to try to slow or stop them?
Do you think that international agreements—like the Kyoto Protocol—can make a difference in levels of greenhouse gases? Is that difference worth the estimated cost ($600 billion over the next ten years)?
Do YOU do anything to reduce your "ecological footprint"—the amount of energy and resources you use and waste you produce?
Would you be willing to pay more for electricity from low-carbon sources (like wind power or biomass energy) if it meant a reduction in greenhouse gases?
Do you use public transportation, walk, ride a bike, or carpool? Why or why not?