A plan to ban diesel cars in Bristol has been criticised by concerned residents and described as "stupid".
On Tuesday the city became the first UK city to propose such a ban in a bid to reduce air pollution.
The ban on privately owned diesel cars from a central zone in the daytime is due to start in 2021 after an outline plan was approved by the city council.
The authority says it is necessary in order to meet a legal obligation to reduce air pollution.
But the plan has led to concerns from some people, including local residents, business owners and hospital visitors.
Details of specifics such as the cost of fines and who might be exempt from the ban are yet to be decided.
The plans have been welcomed by some people concerned about pollution levels.
How many lives will be saved through reductions in nitrogen dioxide?— Henry Palmer (@officialhenryp) November 6, 2019
Proud of my city, increasingly optimistic about the future.
BBC News - Bristol clean air diesel ban plan approved https://t.co/wrXHwjpuNG
Christina Biggs from the Bristol Clean Air Alliance said the group "broadly" supported the blanket diesel car plan because it affected poor and wealthy alike.
But others have criticised the impact the plan will have on low-income families and businesses in the city centre.
One concerned resident, Sean Sparkes, called it a "stupid plan".
So we were told to buy diesel and now you want to ban them. Bristol economy will be effected. Bristol will just be a sea of empty shops and hipster coffee shops! Just another stupid plan and money maker. I hear Cardiff is an alternative to Bristol lol— Sean Sparkes (@SeanSparkes) November 5, 2019
Matt Griffith, from Business West, said the proposed ban would hit "traffic that just wanted to move north and south, or east and west".
"Many of these roads aren't the most polluted, but seem to have been drawn into the ban in order to achieve compliance for a small number of central roads slightly quicker."
Bristol set to become first UK city to ban diesel vehicles— Rich (@RichardHall1978) November 5, 2019
Bravo @BristolCouncil. Taxing the poor is a real victory. Be proud.
You’re too busy being misled by hippies to see the more ‘here and now’ real issue of hurting low income families. https://t.co/3MkFH2oPir
There are also concerns it will simply move the most polluted area away from the city centre into residential areas.
Concerns have also been raised over how it will affect access to the Bristol Royal Infirmary and Bristol Royal Children's Hospital - both situated next to the boundary of the ban zone.
A spokesperson for University Hospitals Bristol NHS Foundation Trust said it was in contact with the council and it aimed to "ensure there will be no disruption to patient care and the smooth running of the city centre hospitals".
Some people took to social media to voice worries about whether blue badge holders would still be able to drive their diesel cars.
Really concerned about #bristol ban on diesel cars - decision yet to be made whether disabled blue badge holders will be exempt. Current proposal will mean I’ll be unable to work & volunteer, make 2/3rds of my hospital appts & huge impact my small support network #dieselban— Letty Fox (@wheelingnable) November 5, 2019
There have also been fears expressed that tourism in the city centre will be hit by the ban.
A spokeswoman for the SS Great Britain Trust said trustees were concerned that it would threaten the survival of the attraction.
Green councillor, Jude English, said she wondered whether people who could afford to pay the fines would drive into the area anyway.
Mike Hawes, of The Society of Motor Manufacturers and Traders (SMMT), said the proposed ban went "against government guidelines".
"[It] fails to distinguish between modern vehicles and decades-old technologies and will only cause confusion for drivers while also undermining efforts to boost air quality."