Mexico City Wednesday signed an agreement with Japanese auto giant Nissan to deliver recharging infrastructure for electric vehicles in 2011, a measure officials said will help fight climate change. The government will set up a series of buildings similar to gas stations for electric car owners and Nissan will respond by importing 500 units of its Leaf electric vehicle in 2011. Mexico City has at least two electric car showrooms, but the vehicles sold there have to be recharged from the domestic supply. The city was once one of the world's worst polluted, but has been implementing a series of measures to reduce emissions of carbon dioxide and other emissions including only allowing electrical public transport on key city center routes. Earlier this week, the city government announced plans to fight climate change from a different source starting next year, by using Germany-made equipment to capture greenhouse gas methane that is produced by rotting liquids at a huge city dump. Methane, which has a 20 times stronger effect than carbon dioxide, is given off when waste rots in anaerobic conditions. The city plans to build tanks where garbage will rot and bottle the gas at its Bordo Poniente Landfill, a massive dump that receives 2,500 tons of city waste daily. 