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Hypercapnia (from the Greek hyper, "above" or "too much" and kapnos, "smoke"), also known as hypercarbia and CO 2 retention, is a condition of abnormally elevated carbon dioxide (CO 2) levels in the blood. Carbon dioxide is a gaseous product of the body's metabolism and is normally expelled through the lungs.
Under most conditions, the partial pressure of carbon dioxide (PCO 2), or concentration of carbon dioxide, controls the respiratory rate. The peripheral chemoreceptors that detect changes in the levels of oxygen and carbon dioxide are located in the arterial aortic bodies and the carotid bodies. [2]
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]
John Vechey of PopCap Games recently joined The Motley Fool for a climate change summit. His first panel guests are Dr. Rachel Cleetus and Dr. Joe Casola. Dr. Cleetus is a climate economist with ...
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]
Most is carbon dioxide from burning fossil fuels: coal, oil, and natural gas. Human-caused emissions have increased atmospheric carbon dioxide by about 50% over pre-industrial levels. Emissions in the 2010s averaged a record 56 billion tons (Gt) a year. [17] In 2016, energy for electricity, heat and transport was responsible for 73.2% of GHG ...
One of the top targets of industry groups and Trump is the EPA's clean vehicle rules, which aim to cut tailpipe emissions by 50% from 2026 levels by 2032 and encourage the shift to more electric ...
Air travel amid COVID outbreaks can be unnerving but a carbon dioxide detector can help gauge risks. Here's what a CO2 detector showed on a flight.