Should Cloning Should be Banned?

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Embryonic stem cells has opened up new way in medical sciences,it shows promise for curing many disease and disorders,but it also started a new debate whether its ethical or unethical, Because if u take embryonic stem cells from embryo ,the embryo will not survive,So whether embryonic stem cells are necessary or not What is ur opinion? Pls be descriptive and provide links favoring u views (if any),it will helpful