National Express West Midlands is offering passengers a free day of bus travel to celebrate Clean Air Day.
The Birmingham-based bus operator is giving complimentary Daysaver tickets to West Midlands customers who use or sign up for its free mTicket mobile app.
National Clean Air Day is on Thursday June 21 and people are being encouraged to try public transport.
Travelling to work by car exposes people to 21 per cent higher levels of pollution than any other mode of transport.
For more information on how to claim your free bus pass, click here.