The Government has ordered Coventry City Council to start charging motorists to enter the city, in a bid to meet clean air targets.
Cars, taxis, buses and lorries could all face a fee to drive into the Clean Air Zone.
The demand comes after the city council's £83million plan to cut pollution was rejected by the Department for Environment, Food and Rural Affairs.
Instead, they have directed the council to implement a Class D clean air zone "as soon as possible" - an outcome previously described as "economically disastrous" for Coventry.
The 'Class D' measure, similar Birmingham's clean air zone, would lead to charges for buses, coaches, taxis, PHVs, HGVs LGVs and cars whose engines are not clean enough.
Coventry City Council will now have just weeks left to revise their plan, having been set a deadline of June 14 to respond.
Coventry City Council has accused the Government of using a 'heavy handed tactic'.
DEFRA says air pollution is a significant threat to public health: