More specifically, fish, legumes, whole grains, fruit, and veggies, and nuts all made the researchers' list of go-to foods.
Increased food production has contributed to improved life expectancy and reductions in hunger worldwide, but these benefits are being offset by global shifts toward unhealthy diets high in excess calories from sugar and meat, the researchers said.
Entitled "Food in the Anthropocene: the EAT - Lancet Commission on healthy diets from sustainable food systems", the three-year study is a joint initiative of the EAT Forum and The Lancet medical journal.
He's a professor of population nutrition and global health at the university's School of Population Health. That includes people who are either undernourished or overnourished.
Scientists from 16 countries have revealed a diet that they say could save the planet and prevent 11.6 million people from dying prematurely every year.
The second problem is that the world's food systems are unsustainable.
Global targets will need to be applied locally.
It would also reduce the damaging effects of climate change, soil erosion, deforestation and loss of biodiversity. It interferes with the global nitrogen and phosphorus cycles, and changes how land is used.
Though estimates vary, a report by the United Nations said livestock is responsible for about 15 percent of the world's gas emissions that warm the climate.
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In response to the EAT-Lancet report's suggestion that food production systems need to change to predominantly plant-based systems, MII stated: "Ireland's grass-based food production systems provide us with a natural competitive advantage to convert this grass feed into high-quality, nutritious meat protein".
The World Business Council for Sustainable Development said, "We need governments to help accelerate the change by aligning national dietary guidelines with healthy and sustainable requirements, and repurposing agricultural subsidies". "Through food, environmental measures suddenly become empowering". "These findings suggest that a shift towards a dietary pattern emphasising whole grains, fruits, vegetables, nuts, and legumes, without necessarily becoming a strict vegan, will be beneficial", stated the report.
The cornerstone of "the great food transformation" called for in the study is a template human diet of about 2500 calories per day.
Eggs should be limited to fewer than about four a week, the report says.
The ideal diet has no, or very little, red or processed meat such as this Chinese sausage.
"Unless we dramatically change our production and our consumption we're not going to be able to survive within planetary boundaries, that's what this report is saying", Auckland University's Prof Boyd Swinburn told 1 NEWS.
The current system has gotten so out of whack with the planet, the report says, that almost 1 billion people are going hungry while 2 billion people are eating too much.
But the report avoids advocating particular farming systems, such as organic, saying such an approach would be too prescriptive. Wealthier countries like the USA would need to take even more drastic measures. It's important that this sustainable production is not restricted, as it would lead to increased global climate emissions. They need to develop and implement ambitious science-based solutions that reflect regional needs and cultural preferences.