The map follows a study released earlier this year, which is thought to be the first offering precise figures on how vegetarian and vegan diets could positively affect global health and climate change.

According to the research, carried out by Oxford University’s Future of Food programme, adopting a vegetarian diet could dramatically reduce greenhouse gas emissions, saving millions of lives annually by 2050.

Switching to veggie eating habits could also avoid over £700 billion in costs linked to climate change and healthcare, say the researchers.

If you’re keen to go green, start with these crowd-pleasing vegetarian recipes from London's hottest restaurants.

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