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A scheme has been developed that promises to save lives, feed 10 billion people without causing catastrophic damage to the planet.
Scientists are trying to understand how we are going to feed billions more people in the coming decades.
Their response – "the global health diet" – does not completely ban meat and dairy products.
But he recommends getting most of our protein from nuts and legumes (like beans and lentils).
Their diet requires a huge change in what we have on our plates and allows us to turn to foods that we barely eat.
What changes will I have to make?
If you eat meat every day, then that's the first big jackpot. For red meat, you're looking for a burger a week or a big steak a month and that's it.
You can still eat a few servings of fish and the same chicken a week, but the plants are the source of the rest of your protein. Researchers recommend nuts and a good dose of legumes every day.
There is also strong pressure on all fruits and vegetables, which should be half of every plate of food we eat.
Although there is a reform of "starchy vegetables" such as the humble potato or cbadava that is widely consumed in Africa.
So, what is the diet in detail?
If you have everything ready, here is what you would be allowed every day:
Image caption: Here are plates of food respecting the planetary diet. rules This for real, or just a fantasy?
This plan requires dietary changes in almost every corner of the world.
Europe and North America must mbadively reduce their consumption of red meat, East Asia must reduce its fish, Africa on starchy foods.
"Mankind has never tried to change the food system on this scale and at this speed," said Line Gordon, director of the Stockholm Resilience Center, at Stockholm University.
"Whether it's a fantasy or not, a fantasy does not have to be bad … it's time to dream of a good world," she says.
According to the researchers, taxes on red meat may be needed to persuade us to change plans.
Who came with that?
A group of 37 scientists from around the world have been brought together as part of the EAT-Lancet commission.
They are a mix of experts from agriculture to climate change, through nutrition. They took two years to present their findings that were published in the Lancet.
Why do we need a diet for 10 billion people?
The world population reached seven billion in 2011 and now stands at around 7.7 billion. This figure is expected to reach 10 billion by 2050 and will continue to increase.
Will it save lives?
Researchers say the diet will prevent an estimated 11 million people from dying each year.
This number is largely due to the reduction of diseases related to unhealthy diets such as heart attacks, strokes and some cancers. These are now the deadliest in developed countries.
So will this regime save the planet?
The goal of the researchers was to feed more people while:
- minimize greenhouse gas emissions
- prevent any kind of extinction
- having no expansion of agricultural land, and
- keep the water
However, it is not enough to change the diet.
The addition of figures also requires a halving of food waste and an increase in the amount of food produced on current farmland.
Why is not meat forbidden?
"If we only downplayed greenhouse gases, we would say everyone is vegan," said Professor Willet.
However, it was unclear if a vegan diet was the healthiest option, he said.
What are we doing now?
The EAT-Lancet Commission will forward its findings to governments around the world and to organizations such as the WHO to see if it can start changing the way we eat.
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