the question is that what happened when the ozone layer becomes destroyed?
And you are in physics? In college?
http://en.wikipedia.org/wiki/Ozone_layer
When the ozone layer becomes destroyed or depleted, several consequences occur. Primarily, the depletion of the ozone layer leads to an increase in the amount of ultraviolet (UV) radiation reaching the Earth's surface. Increased UV radiation can have harmful effects on both humans and the environment.
1. Human health effects: Higher UV radiation levels can cause various health issues, such as an increase in skin cancers (particularly melanoma), sunburns, cataracts, and damage to the immune system. It can also exacerbate certain pre-existing conditions, such as asthma and other respiratory diseases.
2. Environmental effects: Increased UV radiation can negatively impact ecosystems and biodiversity. It can harm marine life, including phytoplankton and coral reefs, disrupt the reproductive cycles of animals, and harm overall biodiversity.
3. Crop damage: Higher UV radiation can harm crops and agricultural productivity. Plants can experience reduced photosynthesis, stunted growth, and decreased yields, leading to food scarcity and economic consequences.
To understand how the ozone layer becomes destroyed, we need to consider the role of certain chemicals known as ozone-depleting substances (ODS). The primary ODS responsible for ozone depletion are chlorofluorocarbons (CFCs), halons, carbon tetrachloride, and methyl chloroform. These chemicals were commonly used in aerosol propellants, refrigerants, foam-blowing agents, and certain industrial processes.
When these ODS are released into the atmosphere, they rise and interact with the ozone molecules in the stratosphere. Through chemical reactions, ozone molecules are broken down, resulting in a decrease in the concentration of ozone. This process is known as ozone depletion.
To prevent further destruction of the ozone layer, the international community took action by adopting the Montreal Protocol in 1987. The protocol aims to phase out the production and consumption of ODS. As a result, the ozone layer has shown signs of recovery, although complete restoration will take several decades.
It is crucial to continue monitoring and reducing the emission of ODS to ensure the preservation and recovery of the ozone layer.