Ozone has an absorption band in the range of blue. It is not very strong, but it will contribute a bit to the blue coloration of the sky, even at the very low concentrations in our atmosphere. Beyond this, we visualize the ozone layer by using satellites and looking at the absorption / reflection / emission of UV light at different places above Earth's surface.
See "What is causing the depletion of the ozone layer?"
See "In what layer of the atmosphere do you find the ozone layer?"
See "What is the ozone layer?"
The ozone layer is primarily found in the stratosphere, which is the second layer of Earth's atmosphere. This layer is located above the troposphere where we live and breathe, and it contains a majority of the Earth's ozone gas which plays a key role in filtering out harmful ultraviolet radiation from the sun.
The main factors affecting the ozone layer are the release of ozone-depleting substances like chlorofluorocarbons (CFCs) and halons into the atmosphere. These substances break down ozone molecules, causing thinning of the ozone layer. Other factors such as climate change and pollution can also impact the ozone layer indirectly.
See "What is the condition of the ozone layer now?"See "How large is the ozone hole now?"See "What is the condition of the ozone layer?"
See "What is the ozone layer?"
See "What is the ozone layer?"
See "How was the ozone layer formed?"
See "What does the ozone layer do?"
See "What does the ozone layer do?"
See "What does the ozone layer do?"
See "What color is the ozone layer?"
See "What does the ozone layer do?"
See "How was the ozone layer formed?"
See "What is causing the depletion of the ozone layer?"
See "What is causing the depletion of the ozone layer?"