Explain: What would the universe have to look like if every country consumed at the rate of the U. S.?

If we look at the average American footprint -2-3 of that is made of of carbon emissions. this means that for the four earths we would need if everyone consumes like an American.

Sequoia national park  /  inyo national forest, california, u.s. mount whitney is the tallest mountain in california, as well as the highest summit in the contiguous united states and thesierra nevada—with an elevation of 14,505 feet (4,421 m).