​Rep. Alexandria Ocasio-Cortez, who proposed “Green New Deal” climate change legislation, warned that melting glaciers could release ancient diseases that the modern world is incapable of handling.

The first-term Democrat from New York said she woke up while on vacation at 3:30 in the morning worried about the consequences of climate change.

“I’m 29 years old, I really struggle sometimes with the idea of how to be a policymaker, and potentially have a family in the time of climate change,” she said on Instagram live Tuesday, listing a number of ​impending ​environmental catastrophes like melting glaciers and rising sea levels.

“Scientists fear that there’s a potential that a lot of diseases could escape these melted glaciers, things that were frozen for thousands of years, and that they’re going to get into our water, ​a​nd that humans could contract them, and they are going to be diseases that are thousands of years old that have vectors that we are not prepared for, that we have never seen​,” she said. ​

​Ocasio-Cortez continued that even if primeval diseases aren’t unleashed, the effects of climate change would extend the range of mosquitoes.

“Now mosquitoes are starting to fly further north that carry diseases like malaria, and a whole slew of other things,” she said.

Ocasio-Cortez also said increasing sea levels would be devastating.

“And by the way, sea level rise is probably one of the most expensive parts about climate change,” she said. “You think overhauling our economy to decarbonize and saving the planet is going to be expensive? Try not decarbonizing our economy and allowing sea level to rise, every coastal city to go underwater, every Midwestern city or large swaths in the middle of the country experiencing drought on level that we have not seen, that’s going to be way more expensive.”