Is population growth risking our food security?

In 1830, the world population was only 1 billion. It took 100 years for this number to double. But within a span of only 30 years, in 1960, global population reached 3 billion. Since then, the world population estimate started to spike exponentially, and it took hardly 15 years to reach the 4 billion mark, by 1975. The global population reached 6.8 billion in 2009, and it is