dried soil surface, waterless sewer pipes after long time hot season at mekong delta, viet nam, climate change and el nino make

food security sewer pipes arid asia background barren broken brown change climate crack cracked damage dead delta desert disaster dried drought dry spell dryness earth ecology el nino environment erosion field global ground grunge hard hot land landscape mekong mud natural nature season seasonal soil split surface viet nam vietnam warming waterless weather wilderness