The ozone layer is a layer in the earth's atmosphere containing relatively high concentrations of ozone. Global warming is climate change that causes an increase in the average temperature of the lower atmosphere. I believe there is a relationship between ozone layer and global warming. The following are some reasons there is a relationship between global warming, damage of the ozone layer and the temperature increase on earth.
A. the thinning of ozone layer
I. Information of ozone
II．Chlorofluorocarbons damage the ozone layer
Cl +O →Cl0
Ozone is a very reactive gas, and even at low concentrations it is irritating and toxic. Earth’s atmosphere consists of several layers. The ozone layer that has ability of protecting is located in the stratosphere. There is a reason ozone enter the stratosphere. The ultraviolet radiation break the oxygen gas (O2) in the upper regions of the stratosphere, ozone is formed. Ozone can prevent the harmful radiations from the entering the earth’s atmosphere.
3O2+UVB →2O2 + 2O
A chlorofluorocarbon is a substance that consists of chlorine, fluorine, and carbon. Chlorofluorocarbon use as refrigerants, plastic foams, solvents, and as propellants in spray cans. They are nontoxic, noncorrosive, nonflammable, and very stable. But, when CFCs were released into atmosphere by human, they were broken by UVB, and then Cl will be released from CFCs. In addition, Cl will attract oxygen atom form ozone and become chlorine monoxide, when it meets another oxygen atom, ClO will release oxygen atom, and then they become Cl and O2. Finally, chlorine will break thousands of ozone. When temperatures begin to warm, this chemically active chlorine and bromine react with ozone, causing ozone depletion. They cause the thinning of ozone layer.
CFCs + UVB→ released Cl
Cl +O →Cl0
B. Global warming is caused by humans;
I. Create green house gases; Methane CH4, Nitrous oxide N2O, Carbon dioxide C02 etc.
II. Deforestation = Cutting down trees in the forest reduces the amount of CO2 that is absorbed by the trees.
A greenhouse gas is a gas in an atmosphere that absorbs and emits radiation within the thermal infrared range. There are some different types of greenhouse gas. In order, the most abundant greenhouse gases in Earth's atmosphere are:
1. Water vapor (H2O)
2. Carbon dioxide (CO2)
3. Methane (CH4)
4. Nitrous oxide (N2O)
5. Ozone (O3)
Since the beginning of the Industrial Revolution, the burning of fossil fuels has contributed to the increase in carbon dioxide (CO2) in the atmosphere from 280 ppm to 397 ppm. The greenhouse effect is a process by which thermal radiation from a planetary surface is absorbed by atmospheric greenhouse, and is re-radiated in all directions. Therefore, it causes the radiation be cycling on the surface of earth, then, the temperature on the earth rise fast.
Second, nowadays, people overly cut the trees in the forest, it affect the trees to proceed Photosynthesis. Photosynthetic means that they are able