Campaigners, supported by a report from Greenpeace and Greengauge 21, are advocating for a new 'climate card' subscription system that would allow unlimited train travel across the UK for £49 a month. This proposal aims to simplify the current complex fare structure, which many consider overly expensive, especially compared to rail services in other European countries. The report suggests that while this scheme could lead to a revenue loss of between £45 million and £650 million, it may also generate an additional 122 million rail trips per year and save up to 40 million car journeys, resulting in significant reductions in CO2 emissions. The plan includes potential top-up fees for inter-city and London suburban travel. Critics argue that such a system would require government subsidies but could yield economic growth and improved health outcomes from reduced air pollution. Implementing the climate card could address regional transport inequalities and encourage more sustainable travel options.