As a side note.
Why not spay and neuter humans?? 6 billion is a big number, and we could shed a billion or two, cannt we?? Sure there are plenty of kids to adopt and we can all do with less competition. There are way too many unwanted kids, and unwanted people in this world.
Green house gases would go down, gas prices, prices for real estate, all of that would head down.
Why not stop reproduction of a human race for a change?