EXCERPT:
MANN: "Well, it is. Our national security leaders have been very clear on this. Climate change is the greatest national security threat we face. It is a threat multiplier. It takes existing tensions over food and water and land and it heightens those tensions. And what is ironic, again, when we have a president who says we should ignore climate change and focus on real problems like international terrorism, well, ISIS formed in Syria in an environment where there was an unprecedented drought that forced rural farmer into the city where they were competing for food, water, and space. That led to conflict. It provided an environment in which a terrorist organization like ISIS could form. So that's a fallacy when we try to separate issues like climate change from national security. They are intimately linked."