carbon dioxide
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GC: n

CT: Researchers are developing a new kind of geothermal power plant that will lock away unwanted carbon dioxide (CO2) underground – and use it as a tool to boost electric power generation by at least 10 times compared to existing geothermal energy approaches.
The technology to implement this design already exists in different industries, so the researchers are optimistic that their new approach could expand the use of geothermal energy in the U.S. far beyond the handful of states that can take advantage of it now.

S: http://www.renewableenergyworld.com/articles/2014/01/can-we-turn-unwanted-carbon-dioxide-into-electricity.html (last access: 25 October 2015)

N: 1. 1869, so called because it consists of one carbon and two oxygen atoms. The chemical was known since mid-18c. under the name fixed air; later as carbonic acid gas (1791). “The term dioxide for an oxide containing two atoms of oxygen came into use in the middle of the 19th century.” (Flood).
2. Carbon dioxide (CO2) is the primary greenhouse gas emitted through human activities. In 2013, CO2 accounted for about 82% of all U.S. greenhouse gas emissions from human activities. Carbon dioxide is naturally present in the atmosphere as part of the Earth’s carbon cycle (the natural circulation of carbon among the atmosphere, oceans, soil, plants, and animals). Human activities are altering the carbon cycle—both by adding more CO2 to the atmosphere and by influencing the ability of natural sinks, like forests, to remove CO2 from the atmosphere. While CO2 emissions come from a variety of natural sources, human-related emissions are responsible for the increase that has occurred in the atmosphere since the industrial revolution.
3. Carbon dioxide is naturally present in air to the extent of 0.03 percent by volume and 0.05 percent by weight, in rainwater at 2 to 6 ppm, and in most water supplies from zero to 50 ppm. Carbon dioxide is the gas in carbonated beverages. Dissolved in water, it can form carbonic acid H2CO3.
4. Carbon dioxide plays an important role in the greenhouse effect; in the field of global warming, the terms “carbon dioxide” and “carbon” are very often used interchangeably.
5. Chemical formula: CO2.
6. carbonic acid gas (to be avoided), carbonic anhydride (to be avoided), carbon anhydrid (to be avoided).

S: 1. OED – http://www.etymonline.com/index.php?term=carbon+dioxide (last access: 25 October 2015). 2. http://www3.epa.gov/climatechange/ghgemissions/gases/co2.html (last access: 25 October 2015). 3, 4, 5 & 6. TERMIUM PLUS (last access: 25 October 2015).

SYN: CO2

S: GDT (last access: 25 October 2015)

CR: air pollution, alkalosis, carbon monoxide, climate change, combustion , CO2 emissions, ecology, environment, greenhouse effect, greenhouse gas, planned obsolescence, tropospheric ozone.