Weather events like wildfires, heat waves, and hurricanes have become more extreme in recent years, with climate change working effectively "as a threat multiplier," explains climate scientist Katharine Hayhoe, author of "Saving Us: A Climate Scientist's Case for Hope and Healing." About the recent heat wave, Hayhoe says "scientists have found that that heat wave was virtually impossible without climate change," and it's possible to put a dollar amount on the added economic costs of it. Watch the full "Salon Talks" conversation here to hear more about our climate crisis and how we can fix it: