The U.S. ranks 4th in shrublands
According to the World Resources Institute, there are 2,132,000 square kilometers of shrublands in the United States, which is enough to make the United States rank fourth in that category. Australia ranks first, with 4,007,000 square kilometers of shrublands.

what resources are available in the usa (eg in south africa gold ,in brazil coffee)etc
There are lots of resources available in the USA. If you click on the tab, “How does the U.S. rank in…” you can browse for lots of answers.