::Light Emitting Trees.

Taiwanese researchers have stumbled onto something truly magical. When gold nanoparticles were introduced into Bacopa caroliniana plants they caused the chlorophyll to produce reddish light. Bye-bye street lights? But wait, there's more:

While lit, the glowing vegetation consumed more carbon from the atmosphere than normal (i.e. the luminescence causes the cells to undergo photosynthesis).

PopSci calls this a "triple threat," in that the trees could cut energy costs, reduce global warming and keep streets safely lit at night. I'm more than inclined to agree. 

Further Reading and Information Courtesy: My Brain, PopSci.