Biosafety refers to environmental safety in the context of genetic engineering. Genetic engineering risk a new form of pollution or ‘contamination’, called genetic pollution or biopollution. In certain cases, biopollution can have major health and environmental impacts and create biohazards dangers threatening biodiversity at the genetic, species or ecosystem level. The introduction of new species into ecosystems is one form of biohazard – invasive species dominate ecosystem and displace native biodiversity. The introduction of exotic genes into organisms is another form of biohazard, since its ecological impacts are unpredictable.