Here’s why we’re heading toward a global food crisis:

1) In the next few decades we will add 2.5 billion more humans to the planet – as many people as were living on earth in 1950.

2) The vast majority of them will arrive in developing nations, mainly in sub-Saharan Africa and South Asia, places with weak infrastructures (bad roads, bridges, rail systems, communications, irrigation systems, etc.), often unstable governments, and deep-rooted poverty. Places, in other words, that are least able to handle huge boosts in population.

3) Climate change is likely to hit those same countries hardest.

4) Good water is going to be harder to get. Farms use most of the fresh water on the planet.

5) Increasing energy costs are going to drive up the price of producing food.

6) A bunch of other stuff, including soil erosion, rural-to-urban migration, and increasing pollution threaten agriculture in one way or another.