<prompt> Translate the following text to EnglishUtendaji wa binadamu umebadilisha sana mzunguko wa nitrojeni ya ardhi na angahewa, na kuongeza mara mbili kiasi cha nitrojeni inayopatikana kila mwaka katika aina zinazofaa kwa viumbe hai.  <response>: Human activity has greatly altered the terrestrial and atmospheric nitrogen cycle, doubling the annual amount of nitrogen available in forms that are useful to living organisms. 