Why is most of Australia not used for farming/agriculture?

If the distance between two points on the ground is 10 miles and the distance between the same two points on a map is 4 inches, what is the map scale expressed as a ratio?

Which of the following is the main purpose of using an anchored network of booms which funnel debris to a collection area?

Pollution from one country can affect another. for example, south korea is especially affected by pollution and dust storms that come from