YOU SAID:

i'll probably never understand the pollution

INTO JAPANESE

私はおそらく汚染を理解することはありません

BACK INTO ENGLISH

I probably will not understand pollution

INTO JAPANESE

私はおそらく汚染を理解しません

BACK INTO ENGLISH

I probably do not understand pollution

INTO JAPANESE

私はおそらく汚染を理解していない

BACK INTO ENGLISH

I probably do not understand pollution