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Humans are the main indoor source of carbon dioxide (CO 2) in most buildings. Indoor CO 2 levels are an indicator of the adequacy of outdoor air ventilation relative to indoor occupant density and metabolic activity. Indoor CO 2 levels above 500 ppm can lead to higher blood pressure and heart rate, and increased peripheral blood circulation. [85]
As the sensor reads the increasing amount of carbon dioxide levels in a space, the ventilation increases to dilute the levels. When the space is unoccupied, the sensor reads normal levels, and continues to supply the unoccupied airflow rate. This rate is determined by the building owner standards, along with the designer and ASHRAE Standard 62. ...
New studies show that CO2 inside buildings could be just as harmful as outside.
Carbon dioxide emissions from human activities are the primary cause of ocean acidification, with atmospheric carbon dioxide (CO 2) levels exceeding 422 ppm (as of 2024). [70] CO 2 from the atmosphere is absorbed by the oceans.
For instance, electric stoves are cited as emission-free 'clean' alternatives to biomass at the household level. [ 30 ] However, negative externalities still exist – ambient air pollution in areas near power plants still poses a health risk, while the generation of electricity in India and China (countries largely dependent on coal for ...
The symmetry of a carbon dioxide molecule is linear and centrosymmetric at its equilibrium geometry. The length of the carbon–oxygen bond in carbon dioxide is 116.3 pm, noticeably shorter than the roughly 140 pm length of a typical single C–O bond, and shorter than most other C–O multiply bonded functional groups such as carbonyls. [19]
In its language, the bill specifically identifies carbon dioxide and other greenhouse gases earlier defined by the EPA as regulated pollutants under the EPA's remit. The bill also gives the EPA more than $27 billion in funding for regulation under the CAA, through a green bank for carbon dioxide and direct grants for methane. [11] [12] [13] [14]
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