The analysis starts from the so-called "Theory of the 9 planetary borders" as formulated in 2009 by the geophysical Swedish Johan Rockström : nine thresholds of environmental human activity should not exceed to maintain intact the Planet. Scientists have established how many people you can feed without exceeding these limits date technology, diets and socio-economic conditions current. In detail, the team directed by Gerten has examined four of the nine boundaries, those directly connected to food production: the maintenance of biodiversity, the sustainable use of fresh water, the appeal is limited to nitrogen, in agriculture and deforestation practices. Based on various simulation models, the work shows how the current food system is able to provide a balanced diet (2,355 kcal per capita per day), to only 3.4 billion people. The work quantifies for the first time, the unsustainability of the present rate of exploitation of food resources. the "Rethinking the food system" The diagnosis is merciless, but scholars who suggest the cure. "Subtract land for farming and intensive cultivation, fertilizziamo and irrighiamo too much to the peril of the water cycle, these are the main problems," says Gerten. And he continues: "To solve them, you need to completely rethink the food supply chain.". According to the researchers, in fact, the only reorganization of rational farming techniques that would ensure a sustainable food for the 7.8 billion people, slightly more than the current population.
We can narrowly feed 10 bn people without wrecking the planet -- but it requires a fundamental redesign of the global food system. 5 years of our work went into this major study, finally published today @MattiKummu @jrockstrom @PIK_Climate @naturesustainab https://t.co/9wKYqPm5mw— Jonas Jägermeyr (@JonasJaegermeyr) January 20, 2020
In the world we are 7.7 billion people and we produce food in order to nourish the 3.4 in a sustainable way
MORE than half of the production of food globally is unsustainable and actually harmful to our Planet. To say it is a five-year analysis just published on Natur
28 January 2020 Tuesday 15:01 - 58 reads.