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The globe-trotting billionaire behind a campaign to save the planet by drastically reducing meat consumption is accused of blatant hypocrisy.

Gunhild Stordalen, a Norwegian who owns a £20million private jet with her husband, regularly flies to exotic destinations around the world.

Air travel pollution is a major contributor to global warming.

Critics claim the pair are doing exactly what she is fighting against.

Christopher Snowdon – the head of lifestyle economics at the Institute of Economic Affairs – said: “The hypocrisy of this is breathtaking.

“This is a campaign telling ordinary people they should be eating less than half a rasher of bacon per day for the sake of the environment, while the patron is flying people around the world in private jets creating one enormous carbon footprint.

“This is a classic case of do as I say not as I do. Militant environmentalists can’t resist the chance to tell people how to live their lives and demonise everyday items of food.

“It’s a shame they don’t hold their financiers to the same standards.”

Model-turned-doctor Gunhild, 40, bankrolled the EAT-Lancet study which this week unveiled daily quotas such as no more than a 2p-sized beef burger; two-thirds of a fish finger; or a quarter of a chicken breast.

The green campaigner and vegetarian, founded the EAT Foundation in 2013.

It set up the three-year EAT-Lancet commission recruiting 37 experts from 16 countries.

They were flown around the world to dozens of locations to unveil the plan this week.

Gunhild flaunts her lavish lifestyle on social media website Instagram.

In recent months she has posted photos of herself sunbathing in Mexico, relaxing in Greece, hugging a tree in Costa Rica, meditating with husband Petter in Antibes, living it up in Cuba and posing by a pool in St Tropez.

She was also photographed in front of a backdrop of New York skyscrapers in a post lecturing people to cut meat from their diets.

Gunhild suggests alternatives such as beans and nuts.

In recent years she and hotel mogul Petter bought the private jet, a Bombardier Challenger 350.

It was purchased through private business Jetfly, which is owned by another of Petter’s companies.

Their opulent £4million wedding in 2010 was reportedly Scandinavia’s most expensive in history.

Their 237 guests, who were served sushi and champagne, were flown 3,500 miles from Norway to the Moroccan city of Marrakesh where they feasted over three days at La Mamounia luxury hotel.

Rock singer Bob Geldof officiated at the ceremony.

The EAT-Lancet calls for better use of farming land to feed the rapidly growing global population and reduce methane greenhouse gas emissions from cattle.

At the time of going to press last night, Gunhild’s organisation EAT had not commented on the accusation of hypocrisy.

Gunhild, who sits on boards debating green issues at the UN, was yesterday on stage in her home city, Norway’s capital Oslo, plugging the food plan at another huge launch event.

Standing behind a lectern, she said adopting the diet was “a matter of morals”.

She added: “We all have a role to play. Whether we have power, knowledge, money, a voice, a piece of land or a piece of bread.”