It will need to be a lot more than millions of people starving before you will see action, millions of people are already starving. 20 million people are food insecure in Yemen. Millions of people are currently food insecure in the U.S. There is a high rate of food insecurity in Europe. Billions of people will have to die from starvation in a short amount of time, in order for humanity to act...and even then it is uncertain that it would.

We are already seeing poor crop production due to climate issues, Instead of addressing these issues we have decided to compound and make these issues worse.

The only real solution is population reduction, which goes against our very biology as a species. Globally as a species we would need to reduce the amount of our offspring, reducing our population by billions.

A lot of people had kids who should not have had kids...Population explosion pretty much doomed the human race, there is no logistical way to solve this issue. The lucky people are going to die before things get bad, If you have any heart at all you will not be having children.