The correct answer is A. O3 layer.
Supersonic jets cause pollution by thinning of the ozone layer. The ozone layer is a region of Earth’s stratosphere that absorbs most of the Sun’s ultraviolet radiation. It contains high concentrations of ozone (O3) relative to other parts of the atmosphere, although still small in relation to other gases in the stratosphere. The ozone layer contains less than 10 parts per million of ozone, while the average ozone concentration in Earth’s atmosphere as a whole is about 0.3 parts per million. The ozone layer is mainly found in the lower portion of the stratosphere, from approximately 20 to 30 kilometers (12 to 19 mi) above Earth, although its thickness varies seasonally and geographically.
The
ozone layer is important because it protects life on Earth from harmful ultraviolet radiation. Ultraviolet radiation can cause skin cancer and other health problems, and it can also damage plants and animals. The ozone layer is also important for the Earth’s climate. It helps to regulate the Earth’s temperature by absorbing ultraviolet radiation.Supersonic jets cause pollution by thinning the ozone layer in several ways. First, they emit nitrogen oxides (NOx), which react with ozone to form chlorine monoxide (ClO). ClO is a catalyst that destroys ozone. Second, supersonic jets emit water vapor, which can also react with ozone to form chlorine monoxide. Third, supersonic jets fly at high altitudes, where they can directly inject ozone-destroying chemicals into the stratosphere.
The thinning of the ozone layer is a serious problem that can have a significant impact on human health and the environment. It is important to reduce emissions of ozone-depleting substances and to take other measures to protect the ozone layer.
The other options are incorrect. Option B, O4 layer, does not exist. Option C, SO2 layer, is the layer of the atmosphere that contains sulfur dioxide (SO2). Option D, CO2 layer, is the layer of the atmosphere that contains carbon dioxide (CO2).