pollution

The United Nations defines pollution as the presence of substances or heat in the environment that produces undesirable effects:
  • These substances or heat can be in the air, water, or land
  • The nature, location, or quantity of these substances or heat can produce undesirable environmental effects
  • Pollution can also include activities that generate pollutants 
Some examples of pollution include:
  • Air pollution
  • Ground-level pollution
  • Indoor air pollution
  • Marine pollution
  • Noise pollution
  • Nuclear waste pollution
  • Photochemical air pollution
  • Physical pollution
  • Secondary air pollution
  • Thermal pollution 
In 2022, 175 nations agreed to develop a legally binding agreement on plastic pollution by 2024. The goal is to reduce greenhouse gas emissions from plastic production, use, and disposal.