Nyanja ndi nyanja zazikulu kwambiri padziko lonse lapansi. Zikuwoneka kuti zinyalala, madzi akumwa apanyumba, mvula yamchere sayenera kukulitsa mphamvu yamadzi am'nyanja, koma sizili choncho. Zochita zazikuluzikulu zimakhudza dziko lonse lapansi.
Zinyalala za pulasitiki
Kwa anthu, pulasitiki ndi chimodzi mwazinthu zabwino kwambiri, koma mwachilengedwe izi zimakhala ndi zotsatira zoyipa, chifukwa zimakhala zotsika pang'ono. Kamodzi m'nyanja, zinthu zapulasitiki zimadzikundikira ndikuphimba madzi, ndipo kuchuluka kwawo kukuwonjezeka chaka chilichonse. Zochitika monga mabala a zinyalala amapanga pamwamba pamadzi, pomwe pamakhala pulasitiki wambiri kuposa plankton. Kuphatikiza apo, okhala munyanja amatenga pulasitiki ngati chakudya, kumadya ndikufa.
Kutsanulira mafuta
Kutayika kwa mafuta ndi vuto lalikulu m'nyanja. Kungakhale kutayikira kwamafuta kapena kuwonongeka kwa sitima. Pafupifupi 10% ya mafuta onse omwe amapangidwa amatayidwa pachaka. Ndalama zochuluka zimafunikira kuti muchepetse tsoka. Mafuta omwe atayikira samathandizidwa mokwanira. Chotsatira chake, pamwamba pamadzi pamakutidwa ndi kanema wamafuta yemwe salola kuti mpweya udutse. Zomera zonse zam'nyanja zimafa m'malo ano. Mwachitsanzo, zotsatira zakuthira kwamafuta mu 2010 zidasintha ndikusintha kwa Gulf Stream, ndipo ngati ikasowa, nyengo yapadziko lapansi isintha kwambiri, makamaka ku North America ndi Europe.
Nsomba
Kusodza ndi vuto lalikulu m'nyanja. Izi zimathandizidwa osati ndi kuwedza wamba kwa chakudya, koma mwa kuwedza pamalonda. Mabwato opha nsomba samangotenga nsomba zokha, komanso ma dolphin, shark, anamgumi. Izi zikuchititsa kuti anthu okhala m'nyanja zikuchepa. Kugulitsa kwa nsomba kumabweretsa chifukwa chakuti anthu amadzichotsera okha mwayi wopitiliza kudya nsomba ndi nsomba.
Zitsulo ndi mankhwala
- mankhwala enaake;
- sodium polyphosphate;
- sulphate;
- amatuluka;
- nitrate;
- koloko;
- mabakiteriya achilengedwe;
- zonunkhira;
- zinthu zowononga mphamvu.
Uwu suli mndandanda wathunthu wazowopsa zomwe zimawopseza nyanja. Tiyenera kudziwa kuti aliyense amatha kusamalira nyanja zamchere. Kuti muchite izi, mutha kupulumutsa madzi kunyumba, osataya zinyalala m'madzi, ndikuchepetsa kugwiritsa ntchito mankhwala.
