Genetically modified organisms (GMOs) are organisms whose genetic code has been altered in some way. Scientists can now transfer genes between different species. However, little is known about the long-term effects of GMOs on humans and the environment. While some see GMOs as the future, others believe scientists have gone too far in altering life. Common GMO crops include soy, corn, cotton, canola, sugar beets and tomatoes. Reasons for creating GMOs include increasing agricultural yields, improving food production and nutrition, aiding forestry and the environment, and assisting with basic research and health applications. However, critics argue that unintended consequences could occur like insects developing pesticide immunity or transgenic organisms negatively impacting ecosystems