Genetically modified plants have had their DNA engineered, usually to induce changes like virus resistance in crops like sweet peppers. There is a risk that modified genes could spread from GMO plants to non-GMO varieties through cross-pollination. Consuming GMO foods could potentially lead to allergies in humans over time, though more research is needed on long-term effects. Modified genes from GMO crops could also end up in weeds, creating "super weeds" that are difficult to control on farms. While GMO foods provide benefits, there are concerns about potential unknown allergens, toxic effects, super weeds, and the spread of antibiotic resistance.