For reasons we don't have to get into, climate change has become an incredibly polarized issue in the United States. I think that is sad. My own personal view is that we're in a planetary emergency such has not been seen in 600,000 years.

For reasons we don't have to get into, climate change has become an incredibly polarized issue in the United States. I think that is sad. My own personal view is that we're in a planetary emergency such has not been seen in 600,000 years.