The world has long produced enough calories, around 2,700 per day per human, more than enough to meet the United Nations projection of a population of nine billion in 2050, up from the current seven billion. There are hungry people not because food is lacking, but because not all of those calories go to feed humans (a third go to feed animals, nearly 5 percent are used to produce biofuels, and as much as a third is wasted, all along the food chain).
The current system is neither environmentally nor economically sustainable, dependent as it is on fossil fuels and routinely resulting in environmental damage. It’s geared to letting the half of the planet with money eat well while everyone else scrambles to eat as cheaply as possible.
While a billion people are hungry, about three billion people are not eating well, according to the United Nations Food and Agriculture Organization, if you count obese and overweight people alongside those with micronutrient deficiencies. Paradoxically, as increasing numbers of people can afford to eat well, food for the poor will become scarcer, because demand for animal products will surge, and they require more resources like grain to produce. A global population growth of less than 30 percent is projected to double the demand for animal products. But there is not the land, water or fertilizer — let alone the health care funding — for the world to consume Western levels of meat.