In many cities, public transport is often the easiest and cheapest way to get around.

It's more environmentally friendly because fewer petrol- and diesel-fuelled cars are on the road.

It's also free, if you visit Luxembourg.

It's the first country in the world to make public transport zero-cost for everyone.

Is it the solution for congestion and pollution, or will the cost of a ticket be paid in other ways?

Presenter: Nick Clark

Guests:

Gabriel Leigh - Transport correspondent for the global affairs and lifestyle magazine Monocle

Constance Carr - Senior research scientist and urban geographer at the University of Luxembourg

Sahrika Panda Bhatt - Founder trustee of the Raahgiri Foundation

Source: Al Jazeera News