YOU SAID:
i wonder how much water is in the world
INTO JAPANESE
世界にはどれくらいの水があるのだろうか
BACK INTO ENGLISH
How much water is there in the world
INTO JAPANESE
世界にはどれくらいの水がありますか
BACK INTO ENGLISH
How much water is there in the world
That didn't even make that much sense in English.