Hundreds of climate scientists are sounding the alarm bell with a new landmark report on climate change. According to the report released by the U.N., heat waves, wildfires, flooding, and droughts are all ramping up. Scientists also say governments need to act fast. Dr. Jessica Tierney, an associate professor at the University of Arizona, is a lead author of that report and studies paleo-climatology, the study of past climates. Soledad talks to her about what we could be facing in the near future. 



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