Detailed Instructions: You are given a sentence in Japanese. Your job is to translate the Japanese sentence into English.
Q: 耕地に適した土地は既に利用されているので世界中で不足しているからです
A:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Because crops are already growing on that land that's very scarce around the world.