Answer: Greek city-state whose primary focus was on art & education
Explanation:
It was extremely cheap to buy slaves and maintain them. It was also beneficial to slave owners because they could sell slaves for more money than they got them for. On top of this slave owners automatically owned any children their slaves had while under their ownership.
Answer: I believe your answer to this "problem" is United States.
Explanation: Since United States is big on a lot of machines to do this stuff, it's considered the highest. Also as you can see, we're the country with the most pollution. Also the peoples ability to do these things in the United States have higher percentages. Hope you fail, Jk good luck with your future