For video fans, here are three videos on climate change and global warming. Be sure and see the third – it’s very dramatic.

White House smacks down climate deniers in new video

“If you’ve been hearing that extreme cold spells like the one that we’re having in the United States now disprove global warming, don’t believe it,” Holdren [White House Science Advisor] says in the video, before launching into a succinct explanation of how uneven global temperature changes are destabilizing the polar vortex and making it “wavier.”

“The waviness means that there can be increased, larger excursions of wintertime cold air southward,” Holdren says. He adds that “increased excursions of relatively warmer” air can also move into the “far north” as the globe warms.

NASA Graphic Shows Six Terrifying Decades Of Global Warming (VIDEO)

Largest Glacier Calving Ever Filmed

This is from “Chasing Ice.” James Balog, the National Geographic photographer, speaks at the end of the film, and his assistants, are staked out on a high ridge above all this and took the videos.

Some of shards of ice are three times taller than the skyscrapers in Lower Manhattan – a comparable area to the breakup zone.