Gene editing technologies, such as CRISPR-Cas9, have made significant progress in the past few years, giving scientists unprecedented capabilities to modify the genomes of organisms. These technologies do have the potential to change the characteristics of organisms, including introducing specific traits. However, using gene editing technology to create organisms with **specific lethal traits** involves serious ethical, legal, and safety issues, including the following aspects: 1. **Ethical considerations**: Deliberately creating organisms with lethal traits is widely considered unethical because it may pose significant risks to ecosystems, human health, and social stability. The scientific community generally advocates responsible research and emphasizes that science and technology should serve human welfare. 2. **Laws and regulations**: Many countries and international organizations have strict legal restrictions on the development, manufacture, and use of biological weapons. For example, the Biological Weapons Convention (BWC) prohibits the development and storage of any pathogens or toxins that can cause disease or death for hostile purposes. These laws are intended to prevent the proliferation and misuse of biological weapons. 3. **Safety risks**: Improper use of gene editing technology may lead to unpredictable consequences, such as unexpected genetic mutations, spread to wild populations, or be used by criminals for malicious purposes. These risks need to be controlled through strict regulation and safety measures. 4. **Scientific responsibility**: Research institutions and scientists have a responsibility to follow ethical standards and ensure that research is not used for harmful purposes. Most scientific research groups advocate open communication and transparency to promote the safe and responsible application of science and technology. In summary, although gene editing technology theoretically has the ability to modify biological characteristics, creating organisms with specific lethal characteristics not only poses major technical challenges, but also serious ethical, legal and safety obstacles. The international community and relevant institutions are working hard to ensure that gene editing technology is used to promote human health and environmental protection rather than for harmful purposes by formulating and enforcing relevant regulations.