The Los Tunjos lagoon is seen in Sumapaz's National Park in this file picture taken April 3, 2009. In mountainous central Colombia, the Arhuaca Indian tribe is concerned that the country's water supply is being threatened by an expanding unregulated agricultural sector. Picture taken April 3, 2009. To match feature COLOMBIA-WATER REUTERS/Jose Miguel Gomez/Files (COLOMBIA ENVIRONMENT POLITICS CONFLICT)
REUTERS/Jose Miguel Gomez