It’s already the biggest distraction for office workers, who spend their time chatting with mates and “poking” strangers, but now Facebook is encouraging its members to help save the planet.

The social networking site has joined forces with a car-sharing firm that aims to cut congestion and pollution by allowing people to hitch a lift online. The concept is simple: users of Facebook can add an application that will put them in touch with others who have a car and are offering a lift, or vice versa.

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