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A combo shows the Brandenburg Gate submerging into darkness during the Earth Hour environmental campaign in March 29, 2014 in Berlin. Lights went off in thousands of cities and towns across the world on today for the annual Earth Hour campaign, which is aiming to raise money via the Internet for local environmental projects. AFP PHOTO / JOHANNES EISELE (Photo credit should read JOHANNES EISELE/AFP/Getty Images)

A combo shows the Brandenburg Gate submerging into darkness during the Earth Hour environmental campaign in March 29, 2014 in Berlin. Lights went off in thousands of cities and towns across the world on today for the annual Earth Hour campaign, which is aiming to raise money via the Internet for local environmental projects. AFP PHOTO / JOHANNES EISELE        (Photo credit should read JOHANNES EISELE/AFP/Getty Images)