What is a significant long-term impact of chlorine atoms in the stratosphere?

The significant long-term impact of chlorine atoms in the stratosphere is the continued destruction of ozone. When chlorine is released into the atmosphere, particularly from human-made compounds such as chlorofluorocarbons (CFCs), it can cause significant harm to the ozone layer. Chlorine atoms are highly reactive and can break apart ozone (O3) molecules, converting them into oxygen molecules (O2). This process leads to a depletion of ozone in the stratosphere, which is crucial for absorbing the majority of harmful ultraviolet (UV) radiation from the sun.

The ozone layer acts as a protective barrier, shielding life on Earth from excessive UV radiation. With the destruction of ozone, more UV radiation reaches the Earth's surface, leading to increased risks of skin cancer, cataracts, and other adverse effects on living organisms and ecosystems. Therefore, the presence of chlorine atoms in the stratosphere has a long-lasting and detrimental effect on ozone concentrations, making it a significant environmental concern.