Food supply

In the past 100 years the world's population has increased four fold going from 2 billion to 8 billion and the main reason is the increase in food production and that comes primarily from biotechnology and fertilizer. Since 1950 corn yields have increased from 40 bushels per acre to 180 bushels. Food production increased more than four fold which allowed for the population increase. In 1950 the average family spent 30% of their budget on food and today that number is 11%. Today 80% of all fertilizer is made from natural gas and over the next few years the price of natural gas will be rising and demand outpaces supply.