Michio Kaku: The Cheapest Way to Terraform Mars

TED & Talks
Rather than hauling heavy atmospheric pumps from earth, the way to create a habitable atmosphere on Mars is to take advantage of its own topology, geography and nature.

Read more at BigThink.com: http://bigthink.com/dr-kakus-universe/the-cheapest-way-to-terraform-mars

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Transcript:
Let’s be blunt.  It will take centuries to terraform Mars.  Mars is a gigantic planet, roughly on the order of half the size of the planet Earth. The key is not to bring pumps to the planet Mars because it costs too much money. The way to do it is to take advantage of Mars’ own topology, geography and nature.Beneath the surface of Mars is lots of carbon dioxide.  If you could heat up the planet a little bit that will release carbon dioxide and initiate a greenhouse effect, which will then melt more ice and let more carbon dioxide come up, so in other words, you have an autocatalytic effect.  You just have to jumpstart it. 

Once you jumpstart it more carbon dioxide creates more temperature.  It heats up the planet, which releases more carbon dioxide.  So then the question is how do you jumpstart it?  A number of mechanisms have been proposed; greenhouse effects, hydrogen bombs, nuclear power plants to raise the temperature of Mars a little bit and that will then set off a chain reaction releasing even more carbon dioxide into the atmosphere.  That’s the cheapest way to take advantage of the carbon dioxide that already exists rather than hauling pumps and generators from the Earth to Mars.

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