Scientists estimate that there are about 400,000 different species of plants on Earth. It's much harder to estimate how many of them are edible, but figures range from 80,000 to a whopping 300,000.
But, in all the cultures across the world combined, we eat only 200 of those edible plants. Amazingly, about 50 percent of the plant calories we do eat come from just three species: rice, wheat, and maize (corn).
But, in all the cultures across the world combined, we eat only 200 of those edible plants. Amazingly, about 50 percent of the plant calories we do eat come from just three species: rice, wheat, and maize (corn).