This is a fantasy
It's physics, yes, this kind of thing isn't unusual it's actually very easy for us to do, there's also plans for us to find hotspots in the ocean created by climate change and to transfer that heat into energy using platforms, unfortunately I've totally forgotten the name of the actual process, but they're apparently working on a prototype for a resort to see if it works.
It amazes me there is so much waste product like C02 coming into our atmosphere that there hasn't been a global push to use all these solutions available, there are also bacteria out their that actually convert Carbon Dioxide which people have engineered.
http://www.rsc.org/chemistryworld/news/2009/november/15110901.aspAll we'd need to do is mass produce this bacteria and then we've pretty much saved the world as all that carbon dioxide would generate tons of fuel as a by product, in theory we could also finally use incineration because we'd just put these things to work on the by product of that and then we won't have a problem with trash either.