C. on Sunday will coordinate a final push to break through the one billion barrier.

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C. startup trying to build microgrids in the U.S. A city with robust microgrids could break this 15 percent barrier by giving neighborhoods and utilities the flexibility to supply, store, and use local power in several ways.

FORBES: D.C. Park Reveals the Gap Between Microgrid Promise and Reality

It seems that some people break down vitamin C into oxalate at higher rates than others, which may explain the link to formation of kidney stones.

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Zidane grabbed one back before the break and Guti scored the equaliser on 60 minutes to ensure Real remain in control of Group C.

BBC: Zidane rescues Real