This document provides an overview of cloning techniques and issues. It discusses that clones are exact genetic copies and describes two cloning techniques: artificial embryo twinning which mimics natural twinning, and somatic cell nuclear transfer which produces identical embryos. It notes therapeutic cloning aims to produce stem cells from cloned embryos while reproductive cloning aims to create a human copy. The document outlines some potential uses like medicine and livestock but also risks like failure rates and abnormal development. It closes by mentioning some ethical issues around human control and genetic makeup.