According to a new survey by comparethemarket.com, more than 4.5 million people (7% of the UK population) now identify as vegan.
The findings also show that 14% of the population has switched to vegetarianism to try and decrease their carbon footprint.
The survey was supported by Gresham College professor Carolyn Roberts, who believes that dietary changes could be the best way to save the environment.
She said: “Environmental issues continue to rise up the national agenda.”
“However, and quite naturally, the desire for change does not always translate into genuine action, as other priorities can overwhelm many of us, particularly those in with demanding jobs and families.”
“The good news is that more practical changes, such as a shift in diet, could be a superior solution to having a positive impact on the environment.”
“Estimates suggest that if all of our meat eaters switched to a vegan diet, it would roughly halve total greenhouse gas emissions associated with food.”
The survey also looked at whether consumers would be more willing to give up their car or consuming meat, in a bid to help the environment.
Almost half of those asked (47%) said that they would be happy to give up meat if it meant that they could continue using their car.