Capable of carrying up to 7,000 students, researchers and professors, the 3,000-foot vessel runs completely on renewable energy, producing no waste.
Creating water out of air, the world's largest airship and a Storm Trooper named Eric round out this week's gallery.
In the future, it won't be uncommon for entire neighborhoods to produce more energy than they consume.
Vertical farms increase production of food, reduce waste and naturally scrub the air of smog. What's not to love?
Glass-paneled walls filled with water absorb heat during hot spells and distribute it during cold snaps.
Massachusetts wins top marks for energy efficiency in an energy contest between the Patriots and Seahawks.
An urban plan for Paris could reduce the city's greenhouse gas emissions by up to 75 percent in 2050.
The process that tints the window actually produces, instead of uses, a small amount of electricity, which could be harnessed to power electronics.
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