CAMPAIGNERS urged ministers to introduce a monthly “climate card” to encourage greener travel today.

Research commissioned by Greenpeace suggests introducing a £49-per-month rail card granting users unlimited train travel across Britain.

The report, by transport think tank Greengauge 21, estimates that the scheme would generate an additional 122 million rail trips per year, and lead to a reduction of 40m journeys that would usually be taken by car.