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Carbon dioxide is the lasing medium in a carbon-dioxide laser, which is one of the earliest type of lasers. Carbon dioxide can be used as a means of controlling the pH of swimming pools, [141] by continuously adding gas to the water, thus keeping the pH from rising. Among the advantages of this is the avoidance of handling (more hazardous) acids.
In Earth's atmosphere, carbon dioxide is a trace gas that plays an integral part in the greenhouse effect, carbon cycle, photosynthesis and oceanic carbon cycle. It is one of three main greenhouse gases in the atmosphere of Earth. The concentration of carbon dioxide (CO 2) in the atmosphere reached 427 ppm (0.04%) in 2024. [1]
This is an accepted version of this page This is the latest accepted revision, reviewed on 9 December 2024. There are 2 pending revisions awaiting review. Gas in an atmosphere with certain absorption characteristics This article is about the physical properties of greenhouse gases. For how human activities are adding to greenhouse gases, see Greenhouse gas emissions. Greenhouse gases trap some ...
Carbon dioxide is the molecular detritus left over after organic material — wood, coal, gas, oil — has been burned, and once in the atmosphere it acts like an invisible, heat-trapping blanket ...
Of the increased amounts of carbon dioxide that are introduced to the atmosphere each year, approximately 80% are from the combustion of fossil fuels and cement production. The other ~20% originate from land use change and deforestation. [18] Because gaseous carbon dioxide does not react quickly with other chemicals, the main processes that ...
The second most important greenhouse gas, and the most important trace gas affected by man-made sources, is carbon dioxide. [12] It contributes about 20% of Earth's total greenhouse effect. [13] The reason that greenhouse gases can absorb infrared radiation is their molecular structure.