it averaged 3,000 parts per million in the pail sowic, 1500 in the mess so sewic, it's been less in the tertiary. so what's the big deal? we're at 300, 400? the earth is tolerateed 5,000 in the past. these are the people we have to convince. how do can you, how do you -- >> well, it's, it's hard. but to start with, you've got to move because there was no ice on the planet back then, right? so the ocean was 70 meters higher, right? so that's the first thing. the second thing is we involved, and my daughter asked me recently what would be my scariest thought about climate change. i said, we are designed -- we have a body temperature, a core temperature around 37 degrees, our skin temperature better be 35. if it's not, we overheat. we can get rid of thermal heat by sap rahtive cooling. it turns out nobody on the planet -- nowhere on the planet is the due point temperature above 31 degrees c. warming models suggest that with every degree warming, you get a three-quarter degree increase in the temperature.