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LONDON (AP) British plans to allow scientists to use hybrid animal-human embryos for stem cell research won final approval from lawmakers Wednesday in a sweeping overhaul of sensitive science laws. The House of Commons also clarified laws that allow the screening of embryos to produce babies with suitable bone marrow or other material for transplant to sick siblings.

It was the first review of embryo science in Britain in almost 20 years.

The legislators voted 355 to 129 to authorize the proposals after months of sometimes bitter debate that has pitted Prime Minister Gordon Brown's government and scientists against religious leaders, anti-abortion campaigners and others anxious about medical advances.

Brown says he believes scientists seeking to use mixed animal-human embryos for stem cell research into diseases such as Parkinson's will help improve - and save - millions of lives.

Decisions by Britain's Human Fertilization and Embryology Authority, an independent body which regulates fertility and embryo research in the U.K., to allow the practice have previously been vulnerable to challenges in court.

While Britain has been seen as a world leader... see more