What are negative effects of nanotechnology?

Nanotechnology can pose several negative effects, including potential toxicity to human health and the environment due to the unknown interactions of nanoparticles with biological systems. There are concerns about the long-term effects of exposure, as nanoparticles can penetrate cellular barriers and accumulate in tissues. Additionally, the environmental impact of nanomaterials during production, use, and disposal is not fully understood, raising issues related to pollution and ecological harm. Regulatory challenges also arise, as existing frameworks may not adequately address the unique properties of nanomaterials.