[...] tonnes of rubbish are being accumulated and the lack of space for (IT/THEM) is becoming a complex problem.

Should it be IT or THEM? And why?

  • 3
    In general, you should include the complete sentence or paragraph for complete context. – Em. Apr 13 '17 at 19:28
  • 2
    it (the antecedent is "rubbish") would be fine unless you were talking specifically about a tonnage limit. Also, consider are accumulating as an alternative to are being accumulated. – Tᴚoɯɐuo Apr 13 '17 at 20:44