come on. >> i don't think so. what we have seen is -- what he's doing and it's important to look at this, a lot of what we hear from people like bill nye is speculation about what might look at this, a lot of what we hear from people like bill nye is speculation about what might happen 30, 50, or 80 years in the future based on failed climate models that predate global warming. we know that throughout human history, warming periods like we are in now and yes we are in a warming period, it's been warming for over 300 years. those warming periods were hugely beneficial, with bountiful crops, bountiful food. it was the cold periods that were really bad in between. that's when famine occurs. completely opposite of what bill nye is telling you. >> laura: really quick. they claim that it's not just famines we need to worry about but massive droughts too. here's a nasa climate scientist. >> in our projections what we're saying is that with climate change many of these type of droughts will likely last for