A Japanese child volunteer clears litter at Place de la Concorde in Paris April 19, 2009. A group of Japanese expatriates staged a clean-up action at the famous Champs Elysees avenue on Sunday as part of a monthly campaign. The Greenbird Paris volunteers want to make the metropole a cleaner place for the many thousands of Japanese tourists who come to one of the most visited cities in the world. REUTERS/Thomas White (FRANCE) 

Japanese volunteers prepare to clear litter at Place de la Concorde in Paris April 19, 2009. A group of Japanese expatriates staged a clean-up action at the famous Champs Elysees avenue on Sunday as part of a monthly campaign. The Greenbird Paris volunteers want to make the metropole a cleaner place for the many thousands of Japanese tourists who come to one of the most visited cities in the world. REUTERS/Thomas White (FRANCE ENVIRONMENT SOCIETY) 

Japanese volunteers prepare to clear litter at Place de la Concorde in Paris April 19, 2009. A group of Japanese expatriates staged a clean-up action at the famous Champs Elysees avenue on Sunday as part of a monthly campaign. The Greenbird Paris volunteers want to make the metropole a cleaner place for the many thousands of Japanese tourists who come to one of the most visited cities in the world. REUTERS/Thomas White (FRANCE) 

A Japanese volunteer shows litter she collected from Avenue Champs Elysees in Paris April 19, 2009. A group of Japanese expatriates staged a clean-up action at the famous Champs Elysees avenue on Sunday as part of a monthly campaign. The Greenbird Paris volunteers want to make the metropole a cleaner place for the many thousands of Japanese tourists who come to one of the most visited cities in the world. REUTERS/Thomas White (FRANCE ENVIRONMENT SOCIETY) 

Japanese Greenbird Paris volunteers collect the litter they cleared from Avenue Champs Elysees in Paris April 19, 2009. A group of Japanese expatriates staged a clean-up action at the famous Champs Elysees avenue on Sunday as part of a monthly campaign to make the French capital a cleaner place for the many thousands of Japanese tourists who come to one of the most visited cities in the world. REUTERS/Thomas White (FRANCE ENVIRONMENT SOCIETY) 

Japanese Greenbird Paris volunteers clear litter at Place de la Concorde square in Paris April 19, 2009. A group of Japanese expatriates staged a clean-up action at the famous Champs Elysees avenue on Sunday as part of a monthly campaign to make the French capital a cleaner place for the many thousands of Japanese tourists who come to one of the most visited cities in the world. REUTERS/Thomas White (FRANCE ENVIRONMENT SOCIETY) 

A Japanese volunteer clears litter from Avenue Champs Elysees as a couple have their portrait drawn in Paris April 19, 2009. A group of Japanese expatriates staged a clean-up action at the famous Champs Elysees avenue on Sunday as part of a monthly campaign. The Greenbird Paris volunteers want to make the metropole a cleaner place for the many thousands of Japanese tourists who come to one of the most visited cities in the world. REUTERS/Thomas White (FRANCE) 

Japanese volunteers clear litter from Avenue Champs Elysees in Paris April 19, 2009. A group of Japanese expatriates staged a clean-up action at the famous Champs Elysees avenue on Sunday as part of a monthly campaign. The Greenbird Paris volunteers want to make the metropole a cleaner place for the many thousands of Japanese tourists who come to one of the most visited cities in the world. REUTERS/Thomas White (FRANCE) 

Japanese Greenbird Paris volunteers wear green vests as they clear litter from a path along the Avenue Champs Elysees in Paris April 19, 2009. A group of Japanese expatriates staged a clean-up action at the famous avenue in the French capital as part of a monthly campaign to make the city a cleaner place for the many thousands of Japanese tourists who come to one of the most visited cities in the world. REUTERS/Thomas White (FRANCE ENVIRONMENT SOCIETY) 

Organiser Tada Osamu takes a group photo of volunteers on the Champs Elysees in Paris April 19, 2009. A group of Japanese expatriates staged a clean-up action at the famous Champs Elysees avenue on Sunday as part of a monthly campaign. The Greenbird Paris volunteers want to make the metropole a cleaner place for the many thousands of Japanese tourists who come to one of the most visited cities in the world. REUTERS/Thomas White (FRANCE ENVIRONMENT SOCIETY) 

A Japanese child volunteer plays with tongs used to clear litter from Avenue Champs Elysees in Paris April 19, 2009. A group of Japanese expatriates staged a clean-up action at the famous Champs Elysees avenue on Sunday as part of a monthly campaign. The Greenbird Paris volunteers want to make the metropole a cleaner place for the many thousands of Japanese tourists who come to one of the most visited cities in the world. REUTERS/Thomas White (FRANCE ENVIRONMENT SOCIETY) 

Japanese Greenbird Paris volunteers clear litter from a path along the Avenue Champs Elysees in Paris April 19, 2009. A group of Japanese expatriates staged a clean-up action at the famous avenue in the French capital as part of a monthly campaign to make the city a cleaner place for the many thousands of Japanese tourists who come to one of the most visited cities in the world. REUTERS/Thomas White (FRANCE ENVIRONMENT SOCIETY) 

A Japanese volunteer clears litter from Avenue Champs Elysees as a city street-cleaning truck drives past in Paris April 19, 2009. A group of Japanese expatriates staged a clean-up action at the famous Champs Elysees avenue on Sunday as part of a monthly campaign. The Greenbird Paris volunteers want to make the metropole a cleaner place for the many thousands of Japanese tourists who come to one of the most visited cities in the world. REUTERS/Thomas White (FRANCE ENVIRONMENT SOCIETY) 

Japanese volunteers pose for a group photo at Place de la Concorde in Paris, as Japanese tourists (R) watch, on April 19, 2009. A group of Japanese expatriates staged a clean-up action at the famous Champs Elysees avenue on Sunday as part of a monthly campaign. The Greenbird Paris volunteers want to make the metropole a cleaner place for the many thousands of Japanese tourists who come to one of the most visited cities in the world. REUTERS/Thomas White (FRANCE) 

A Japanese Greenbird Paris volunteer displays her gloves before clearing litter at Place de la Concorde in Paris April 19, 2009. A group of Japanese expatriates staged a clean-up action at the famous Champs Elysees avenue on Sunday as part of a monthly campaign to make the French capital a cleaner place for the many thousands of Japanese tourists who come to one of the most visited cities in the world. REUTERS/Thomas White (FRANCE ENVIRONMENT SOCIETY)