Japan's "Challenge 25"

Supporters, including Prime Minister Yukio Hatoyama, kick off the Challenge 25 campaign in Tokyo, on Jan. 14, to cut greenhouse gas emissions.

( By Koichi Kamoshida/Getty Images )

Supporters, including Prime Minister Yukio Hatoyama, kick off the Challenge 25 campaign in Tokyo, on Jan. 14, to cut greenhouse gas emissions.

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