<prompt> Translate the following text to EnglishViwango vya kuendelea vya kuhifadhiwa kwa sulfuri, ingawa ni ndogo kuliko hapo awali, pia hufanya kazi kuzuia upatikanaji kutokana na mzigo mkubwa sana wa sulfuri kwa miaka.  <response>: Continuing levels of sulfur deposition, albeit smaller than before, also work to prevent recovery due to extremely large sulfur loadings over the years. 