A survey found 22 per cent admitted they try to outdo their peers when it comes to recycling and reducing their carbon footprint.
One-in-five said they had fallen out with a friend or neighbour because they thought they were harming the environment.
And 15 per cent judge their neighbours for their lack of recycling.
The survey by Hyundai showed four-in-ten adults actively inform friends and family if they have bought an eco-friendly product.
More than half (58 per cent) admitted they get annoyed at neighbours who put recyclable items in with general waste.
To make a point, one in 13 made a habit of ensuring their neighbours could see how much recycling they putting out on bin day.
The research also revealed 80 per cent of UK adults take pleasure in recycling while 70 per cent have tried to be more energy efficient over the past two years.
When it comes to car buying, the vehicle’s green credentials are four times as important as its acceleration and top speed.
Nearly 60 percent would consider owning an electric or hybrid vehicle instead of a petrol or diesel to cut down on their carbon emissions.
However, cost (58 per cent) was the biggest concern for Brits considering an eco-friendly car, followed by a worry there aren't enough charging points (54 per cent).
The time it takes to charge a car and range anxiety (both 46 per cent) were other concerns.
It is the only car company in the UK that sells battery electric models, hybrids, plug-in hybrids and hydrogen fuel cell cars.
The firm has just added the new zero-emission IONIQ Electric family saloon to the range, which starts from £29,450, has a range of up to 194 miles, and is also available in hybrid and plugin hybrid powertrains.
As well as the new Kona Hybrid crossover priced from £22,495, which joins the zero-emission Kona Electric offering a range of up to 279 miles.
“Hyundai is committed to accelerating the transition to clean mobility and is investing heavily into alternative-fuel vehicles.
“We already have zero emission models like the Kona Electric and the NEXO fuel cell which actually cleans the air as it’s driven, and by the middle of next year nearly 80% of the range will be available as an electrified version. This will give motorists a wide range of choice and allow them to make the switch to a more environmentally-friendly car that will still suit their needs.”