Nanoparticles are tiny bits of metal that are used in sunscreens, as a wastewater treatment, and for many other purposes. Recent evidence suggests that nanoparticles are toxic to phytoplankton, the primary producers at the base of many aquatic food chains. Phytoplankton use the energy in sunlight to produce organic matter, and they consume CO₂ and release O₂. Predict some possible consequences to biodiversity if nanoparticles become a more common pollutant.