The promo for this shows Lackner and others describing the artificial trees.  
Somewhat misleading in that it suggests they are already being used.  Airs 
Sunday on the Science Channel and repeats.

http://science.discovery.com/tv-schedules/special.html?paid=48.15725.25759.0.0

Hot Planet 
  
The effects of climate change -- massive storms, superfires and rising seas -- 
are potentially catastrophic. But they are not yet inevitable. This film looks 
at the future of global warming, and what man -- and science -- can still do to 
stop it.

Apr 05, 9:00 pm

(120 minutes)

Apr 06, 12:00 am
(120 minutes)

Apr 07, 4:00 am

(120 minutes)
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