California Gov. Arnold Schwarzenegger, New York Mayor Mike Bloomberg and U.N. Secretary General Ban-Ki Moon all opted for shades of green at the Copenhagen climate change summit.
AP Photos (2); Getty Images
Prince Charles, Sen. John Kerry and former British Prime Minister Tony Blair went with blue neckwear.
AP Photos (2); Newscom
Supermodel Helena Christensen looks comfy speaking before a crowd in Copenhagen's Parliament square before the Global Day of Climate Action march.
Zuma Press / Newscom
Climate change protesters dressed as clowns hug a police officer outside the Danish Foreign Ministry while demonstrators pass during the climate march in Copenhagen on December 12, 2009.
Adrian Dennis, AFP / Getty Images
Activists wearing costumes protest in Copenhagen on December 16, 2009 on the 10th day of the U.N. Climate Change Conference.
Adrian Dennis, AFP / Getty Images
Protestors dressed as panda bears with flames on their heads, part of the World Wildlife Fund's (WWF) shut-the-lights campaign, join a rally outside the Danish parliament in the center of Copenhagen on Dec. 12, 2009.
AP Photo
Activists wear polar bear costumes prepare for the 'Save Humans Too' demonstration on Dec. 14, 2009.
Attila Kisbenedek, AFP / Getty Images
Activists protest in Copenhagen on Dec. 16, 2009. Danish police fired tear gas and arrested more than 100 protesters who tried to descend on the global summit on climate change, accusing negotiators of ignoring their voices.
Axed Schmidt, AFP / Getty Images
A protester dressed as death on horseback rides outside parliament in Copenhagen on Dec. 14, 2009.
AP Photo
