Numfashi a cikin injin damfara kai tsaye daga yanayin, don rage yuwuwar lalacewa, lalata da fashewar naúrar, ɗakin kwamfuta da aika wani abu mai fashewa, lalata, iskar gas, ƙura da sauran abubuwa masu cutarwa dole ne su sami ɗan nesa, bec. ...
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