Why is the challenge that humanity faces regarding the global food supply so difficult?

The challenges that humanity face in regards with the global food supply that made it difficult are the following;

- Population. This is a problem because of being over populated, products or goods are being consumed more than having to save more products in the future.

- Consumption of goods. This is also one of the problem because a some people consume more products than a basic people needs in which the supply can decrease.