Mexico City closes world's largest trash dump

                                   
Mexico City has closed its main rubbish dump''Bordo Poniente'' which is one of the world's biggest open-air landfills.Opened 26 years ago, Bordo Poniente receives an average of 12,600 tonnes per day of garbage and accounts for 1.5 percent of Mexico's total emissions of greenhouse gases.Mexico City Mayor Marcelo Ebrard said the closure would significantly help reduce the capital's greenhouse gas emissions.
                                                                                               

Authorities in the Mexican capital said on Monday Dec 19,2011 that concerns about pollution of the air and nearby underground aquifers led them to close ''Bordo Poniente''.