Man seeks to change the foods available in nature to suit his tastes, thereby putting an end to the very essence of life contained in them.
In addition to contributing to erosion, pollution, food poisoning, and the dead zone, corn requires huge amounts of fossil fuel - it takes a half gallon of fossil fuel to produce a bushel of corn.
Well, sometimes you need the fields to lie fallow in order to gain nutrients.
If the water is too clear, there is nothing for the fish to eat.
Paradoxically Americans are becoming both more obese and more nutrient deficient at the same time. Obese children eating processed foods are nutrient depleted and increasingly get scurvy and rickets, diseases we thought were left behind in the 19th and 20th centuries.
Micronutrient deficiency in the soil results in micronutrient malnutrition in people, since crops grown on such soils tend to be deficient in the nutrients needed to fight hidden hunger.
What we've done with our modern food supply is absolute insanity. It's not even real any more. You used to be able to give a kid an apple and they would love it. Kids can't even taste apples any more. Apples taste like paper to kids now.
Vegetables deplete soil. They're extractive. If soil has a bank account, vegetables make the largest withdrawals.