Nanoparticles are already released unintentionally in the environment by high-combustion processes (incineration plant, car engines, weapons, etc.). Their chronic inhalation or ingestion with polluted food can induce pathologies (nanopathologies).
Their dissemination is wide and deep inside the internal organs. Gonads, bone marrow, brain etc. can be target and their accumulation in such organs can cause locallly a biological reaction. Also animals can be exposed to this nanopollution.
If we do not work to stop or at least to decrease this pollution, I think that popolutation, must mostly our children will not have a future.
link (Nanopathologies: the health impact of nanoparticles- www.worldscibooks/nanosci/v001.html
University of Modena and ReggioEmilia