<prompt> tafsiri zifuatazo kutoka kwa swahili hadi kiingereza.mkutano wa nne wa mkutano wa mazingira wa umoja wa mataifa utafanyika nairobi, kenya, kutoka 11-15 machi 2019, juu ya kichwa ufumbuzi wa ubunifu wa changamoto za mazingira na uzalishaji na matumizi endelevu.  <response>: unea-4 took place from 11-15 march 2019 in nairobi, kenya, on the theme, innovative solutions for environmental challenges and sustainable consumption and production. 