Mexico City plans to fight the emission of ethane, a greenhouse gas more than 20 times more powerful than carbon dioxide, by using German made quipment to capture gas produced by rotten liquid and waste, city officials told media on Monday.

The measure will prevent toxic liquid from affecting aquifers and bottle the gas produced by the liquid to be used for cooking and heating at
homes, officials said.

The project will be implemented in 2010 at the Bordo Poniente Landfill, a massive dump that receives 2,500 tons of city waste daily.

The city government will import equipment that is already used in similar projects in the German city of Volksburg. currently Mexico City is
separating recyclable waste from organic waste at the site.

According to the plan, the organic waste will be placed in sealed pits topped with tubes which will be used to send the methane to a bottling
center.

The project has been under discussion since January, when the city's public works department proposed to build a joint venture by the federal
government and the Mexico State government.

Mexican states Puebla, Veracruz and Sonora already have large biogas projects which use rotten animal manure to produce natural gas and
electricity.

Monterrey, capital city of northern Mexico state Nuevo Leon, uses biogas to generate electricity needed to run its metro system.