Tekuna sune manyan ruwayen duniya. Zai zama kamar datti, ruwan kwandon gida, ruwan sama na ruwan acid bai kamata ya ƙara ɓata yanayin ruwan teku ba, amma ba haka lamarin yake ba. Babban aikin ɗan adam yana shafar yanayin Tekun Duniya baki ɗaya.
Shara filastik
Ga mutane, filastik na ɗaya daga cikin mafi kyawun ƙira, amma ga ɗabi'a wannan abu yana da lahani, tunda yana da ƙarancin lalacewar rayuwa. Da zarar sun shiga cikin tekun, kayayyakin roba suna tarawa suna toshe ruwan, kuma yawansu yana ƙaruwa kowace shekara. Phenomena kamar wuraren zubar da shara suna samuwa a saman ruwa, inda akwai filastik fiye da plankton. Bugu da kari, mazaunan tekuna suna daukar roba don abinci, suna ci kuma suna mutuwa.
Zubar da mai
Malalar mai babbar matsala ce ga teku. Zai iya zama malalar mai ko tanka jirgin ruwa. Kusan kashi 10% na yawan man da ake samarwa ana malala ne duk shekara. Kawar da wani bala'i yana buƙatar ɗimbin kuɗi. Ba a magance matsalar malalar mai yadda ya kamata. A sakamakon haka, an rufe saman ruwa da fim na mai wanda baya barin iskar oxygen ta wuce. Duk fure da dabbobin teku sun mutu a wannan wurin. Misali, sakamakon tsiyayar mai a shekarar 2010 shine canji da tafiyar hawainiya na Kogin Gulf, kuma idan ta bace, yanayin duniya zai canza sosai, musamman a Arewacin Amurka da Turai.
Kama kifi
Masunta wani lamari ne mai matsi a cikin tekuna. Wannan ba sauƙin kamun kifi don abinci ba, amma ta kamun kifi a sikelin masana'antu. Jirgin ruwan kamun kifi ba kama kifi kawai yake ba, har ma da kifayen dolphin, shark, whales. Wannan yana ba da gudummawa ga raguwar aiki da yawan mazaunan tekun da yawa. Sayar da kayan kifin ya haifar da gaskiyar cewa mutane sun hana kansu damar ci gaba da cin kifi da abincin teku.
Karafa da sinadarai
- chloride;
- sodium polyphosphate;
- sulfates;
- bilicin;
- nitrates;
- soda;
- kwayoyin halitta;
- dandano;
- abubuwa masu radiyo
Wannan ba cikakken jerin hadurran dake barazana ga tekuna bane. Ya kamata a sani cewa kowa na iya kula da tekuna. Don yin wannan, zaka iya ajiye ruwa a gida, ba jefa shara a jikin ruwa ba, da rage amfani da sanadarai.
