We need to eat less meat - and the G8 should say so

Instead of feeding starving humans, we funnel huge amounts of crops through the animals we use for food. G8 leaders must call for change at next week's summit.

In Davos this April, David Cameron outlined his priorities for the UK's presidency of the G8 this year. He talked about advancing trade, ensuring tax compliance and promoting greater transparency, all with the goal of creating "lasting global prosperity". It's a noble goal – lifting people out of poverty and making corporations accountable for their actions. It's reassuring to see these issues receive international attention.

But there is one obvious issue that is not being talked about, which should be at the top of the G8 agenda: animal agriculture and its contribution to world hunger, environmental degradation and skyrocketing healthcare costs, all of which affect the global economy.

There is more than enough food being grown around the world to feed the entire human population. So why are more than a billion people going hungry? Because instead of feeding starving humans, we funnel huge amounts of crops through the animals we use for food. It takes up to 16 pounds of grain to produce just 1 pound of meat. And an astounding 97 per cent of the world's soya crop goes to farmed animals rather than to hungry people.

We could eliminate the worst cases of world hunger with about 40 million tonnes of food. And it would be easy enough to find: nearly 20 times that amount of grain, 760 million tonnes, is fed to animals on factory farms every single year. Compare this to biofuels, which account for only 100 million tonnes. Tens of thousands of people marched in London on Saturday in support of Enough Food IF, a laudable campaign which highlights biofuels as one of the "bad guys" in the fight to end global hunger – and yet, inexplicably, it doesn't have animal agriculture as one of its key themes.

By cutting our meat consumption and slowing the rate at which animals are bred, we could redirect the crops that they would have consumed to the people who need them most. That's why the prestigious Worldwatch Institute maintains that "[m]eat consumption is an inefficient use of grain – the grain is used more efficiently when consumed directly by humans. Continued growth in meat output is dependent on feeding grain to animals, creating competition for grain between affluent meat-eaters and the world's poor". Therefore, raising animals for meat creates a disturbing social-justice issue.

And as meat-based diets spread to developing countries, subsistence farmers are being driven off their land. Efficient, plant-based agricultural models are being replaced by intensive animal agriculture, which also pollutes the air and water and leads to desertification that renders the once-fertile land barren.

The United Nations reports that the meat industry is "one of the top two or three most significant contributors to the most serious environmental problems, at every scale from local to global". And it's easy to see why. Carbon dioxide, methane and nitrous oxide are the principal agents of climate change – and raising animals for food is one of the largest sources of carbon dioxide and the largest source of both methane and nitrous-oxide emissions. When you add up all the energy-intensive stages of raising animals for food, slaughtering them and processing and storing their flesh, it's clear why producing 1 calorie of animal protein requires more than 11 times as much fossil fuel as producing 1 calorie of plant protein. In addition, Greenpeace estimates that in a single crop season, more than 2.9 million acres of the Amazon rain forest in Brazil are destroyed to make more room to grow crops to feed farmed animals.

The water footprint of the livestock sector is also huge. It takes more than 2,400 gallons of water to produce 1 pound of meat, while growing 1 pound of wheat requires only 25 gallons. You save more water by not eating a pound of meat than you do by not showering for six months!

Not surprisingly, the United Nations Environment Programme concluded  that "[a] substantial reduction of impacts would only be possible with a substantial worldwide diet change, away from animal products".

Environmental issues, in turn, have a serious impact on our economy. Heat waves, droughts, rising sea levels and other problems caused by climate change can ruin crops and result in increased food prices. Major storms, a developing trend that scientists have also linked to environmental destruction, often do billions of pounds in damage. Sir Nicholas Stern, author of the government-commissioned review on climate change, which has been the reference work for politicians and journalists throughout the last 10 years, warns that if we do not reduce greenhouse-gas emissions, it will take less than 40 years for climate change to cause up to a 20 per cent drop in the world's gross domestic product. He fears that it could be "market failure on the greatest scale the world has seen".

Then there are the skyrocketing healthcare costs that are attributable in large part to the increase in human consumption of meat, eggs and dairy products. Loaded with artery-clogging cholesterol and saturated fat, these products have been linked to cancer, heart attacks, strokes, diabetes and obesity. These top killers burden the National Health Service and necessitate that billions of pounds be spent searching for cures and medications to relieve disease symptoms. They also claim a huge number of lives.

Aside from their environmental and health impacts, the meat, dairy and egg industries cause immense suffering to more than a billion animals every year in the UK alone, most of whom spend their entire lives crammed inside dark, filthy sheds. They don't get to breathe fresh air until they are on their way to the abattoir, where many have their throats slit while they are still conscious.

"Lasting global prosperity" can be attained only through sustainable growth – otherwise, we will simply compound current environmental and economic problems. World leaders at the G8 Summit must take into account the devastating impact of animal agriculture in order to encourage global food changes that will be the catalyst for such growth.

The UN reports that the meat industry is "one of the top two or three most significant contributors to the most serious environmental problems". Photograph: Getty Images.

Kerry McCarthy is the Labour MP for Bristol East and the shadow foreign minister.

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John McDonnell praises New Labour as he enters conciliatory mode

The shadow chancellor sought to build a bridge between the past and the present by crediting the 1997 government. 

Ever since Jeremy Corbyn became Labour leader, John McDonnell has been on a mission to reinvent himself as a kinder, gentler politician. He hasn’t always succeeded. In July, the shadow chancellor declared of rebel MPs: “As plotters they were fucking useless”.

But in his Labour conference speech, Corbyn’s closest ally was firmly in conciliatory mode. McDonnell thanked Owen Smith for his part in defeating the Personal Independence Payment cuts. He praised Caroline Flint, with whom he has clashed, for her amendment to the financial bill on corporate tax transparency. Jonathan Reynolds, who will soon return to the frontbench, was credited for the “patriots pay their taxes” campaign (the latter two not mentioned in the original text).

McDonnell’s ecunmenicism didn’t end here. The 1997 Labour government, against which he and Corbyn so often defined themselves, was praised for its introduction of the minimum wage (though McDonnell couldn’t quite bring himself to mention Tony Blair). Promising a “real Living Wage” of around £10 per hour, the shadow chancellor sought to build a bridge between the past and the present. Though he couldn’t resist adding some red water as he closed: “In this party you no longer have to whisper it, it's called socialism. Solidarity!”

As a rebuke to those who accuse him of seeking power in the party, not the country, McDonnell spoke relentlessly of what the next Labour “government” would do. He promised a £250bn National Investment Bank, a “Right to Own” for employees, the repeal of the Trade Union Act and declared himself “interested” in the potential of a Universal Basic Income. It was a decidedly wonkish speech, free of the attack lines and jokes that others serve up.

One of the more striking passages was on McDonnell’s personal story (a recurring feature of Labour speeches since Sadiq Khan’s mayoral victory). “I was born in the city [Liverpool], not far from here,” he recalled. “My dad was a Liverpool docker and my mum was a cleaner who then served behind the counter at British Homes Stores for 30 years. I was part of the 1960's generation.  We lived in what sociological studies have described as some of the worst housing conditions that exist within this country. We just called it home.”

In his peroration, he declared: “In the birthplace of John Lennon, it falls to us to inspire people to imagine.” Most Labour MPs believe that a government led by Corbyn and McDonnell will remain just that: imaginary. “You may say I'm a dreamer. But I'm not the only one,” the shadow chancellor could have countered. With his praise for New Labour, he began the work of forging his party’s own brotherhood of man.

George Eaton is political editor of the New Statesman.