Around the world, there are between 300,000 and 500,000 plant species, of which 50,000 are edible. Of these, around 7,000 plants have been cultivated for human consumption. But today, fewer than 20 crops account for more than 90% of global food production. And of these, three major crops – rice, wheat and maize – represent 60% of the world’s seven billion denizens’ energy intake, according to data from the United Nations’ Food and Agriculture Organization (FAO).
This has resulted in a monotonous, homogeneous diet devoid of many of the plants that used to form the culinary landscape of most communities. And it has sprung another concern: according to the FAO, an increasing number of the global population is being fed on diets that are energy-rich but nutrient-poor, with more than two billion people likely to be affected by one or more micronutrient deficiencies. Conversely, around 2.5 billion people are consuming excess calories (including some with insufficient nutrition).