1) According to the document, Elysium predicts a divided future where the rich live comfortably on Elysium without pollution or illness, while the poor live in deteriorating conditions on Earth with risk of death, pollution, and lethal illnesses. 2) Key differences between Earth and Elysium include advanced technology and perfect cities on Elysium compared to less advanced technology, pollution, and destroyed cities on Earth. 3) The document agrees with some predictions of Elysium, such as society being divided between poor and rich populations and technology enabling robotic control that could negatively impact the poor.