section_path: Environmental problems
section_name: Environmental problems
paragraph_text: Environmental problems
  
  Lead bullets that miss their target or remain in an unretrieved carcass could become a toxicant in the environment but lead in ammunition because of its metallic form has a lower solubility and higher resistance to corrosion than other forms of lead making it hardly available to biological systems. Waterfowl or other birds may ingest the lead and poison themselves with the neurotoxicant, but studies have demonstrated that effects of lead in ammunition are negligible on animal population size and growth. Since 1991, US federal law forbids lead shot in waterfowl hunts, and 30 states have some type of restriction.
  
  In December 2014, a federal appeals court denied a lawsuit by environmental groups that the EPA must use the Toxic Substances Control Act to regulate lead in shells and cartridges. The groups sought EPA to regulate "spent lead", yet the court found EPA could not regulate spent lead without also regulating cartridges and shells.