"The obesity rate doubled" means literally nothing because "obesity" is a threshold. Under the right circumstances a 0.01% increase in weightlifting could lead to a 1000x increase in the "obesity rate".

Makes for a great headline though. And it's a great marketing technique. Want to make your numbers seem arbitrarily fast growing? Find a threshold for engagement that lots of people are moving back and forth across and wait for an up month.

Despite the world having too much food, there are still many people who don't have enough food to eat or are forced to eat very basic diets.

It's because the problem isn't growing food, it's distributing it efficiently.