They had a large of mineral resources.
You should write out y=mx+b and then plug in 1/4 to the m and then plug in the x and numbers to solve for b
Answer: temperate, arctic tundra, tropical, arid desert.
Explanation: The overall climate in the United States of America (USA) is temperate, with notable exceptions. Alaska has an Arctic tundra climate, while Hawaii and South Florida have a tropical climate. The Great Plains are dry, flat and grassy, turning into arid desert in the far West.
That would be 75% of Earth's atmosphere.