Food. The more food available, the more populations grow -- increasing the demand for more food. Reflexive self-reinforcing nature. Is very big food amounts in the world?
If the world population is 7 billion, with each person eating 2 to 3 meals a day, totaling a max of 21 billion meals a day, what will happen if a food producer produces 21 trillion of meals a day? Yeah, sure. You can say the excess 20979 billion of meals be fed to both any pet dogs and stray dogs for free.