CNN: Do you believe that human beings contribute to climate change or do you believe that climate change is a natural part of the way the world works?
Field: It is extremely important for people to understand that as a scientist, I believe at looking at the evidence and try to understand what the evidence is telling me. And the evidence that humans are contributing to climate change is almost beyond dispute at this point. The evidence is overwhelming with the climate system changing. The fact that humans are the drivers by far makes it the most attractive explanation based on the evidence -- not based on what I believe -- but based on what the evidence says.
CNN: If we (humans) continue down the same path we are on regarding our contribution to global warming, what changes do you foresee happening to the Earth?
Field: I think what we are seeing now is that there are already impacts of climate change already occurring. We have already seen extremely hot conditions, heat waves, we've seen flooding. We've seen a clear increase in the number of events like high sea levels that caused Sandy.
The evidence of linkage that cause these things are pretty clear. It is also clear that as we move forward, much of what we will see will be a change in the frequency, the intensity and the duration of these types of extreme events. Climate change is not going to be about a perception about how the average [temperature] has changed. The most important impact that I believe [will happen] when it comes to climate is more extreme conditions.