With a rapidly increasing world population of about 6 billion people, phenomena such as these hold the prospect of large-scale famine and hardship for millions of people. It is because of these serious concerns that the first Earth Summit was held in Brazil in June 1992.
Hivi sasa, idadi ya watu duniani ikiwa zaidi ya bilioni 6, kuna tisho la njaa. Ni kwa ajili ya vitisho hivi kuliitishwa mkutano wa kimataifa nchini Brazili mwezi Juni mwaka wa 1992 kujadili na kuchunguza kwa makini hali ya mazingira yetu.