GLOBAL WARMING DEBATES 3
Modernglobal warming has resulted from increase in degree of the greenhouseeffect, warming of the Earth’s surface, as well as lower atmospheretriggered by presence of carbon dioxide, water vapor, nitrous oxides,methane, and greenhouse gases. In year 2014 the IntergovernmentalPanel on Climate Change (IPCC) recounted that concentrations ofmethane, nitrous oxides, and carbon dioxide in the atmosphereexceeded those found in the ice cores witnessed 800,000 years ago.Out of these gases, only carbon dioxide is most important, due to itsrole in a greenhouse effect as well as in a human economy. Manyscientists estimated that at the start of an industrial age inmid-18th century, the concentrations of carbon dioxide in theatmosphere were approximately 280 parts per million. However, by themiddle of year 2014, the concentration of carbon dioxide hadtemporarily reached 400 parts per million. The scientists also arguedthat if people continue to burn fossil fuels at current rates, thenthe concentration of carbon dioxide will reach 560 parts per millionby mid-21st century, which will be almost double the concentration ofcarbon dioxide a doubling in 300 years ago(Johansen, 2009).
Manyclimate scientists concur that significant economic, ecological, andsocietal damage may result in a case global average temperatureschange by over 2-degree census in a short period. The damage mayinclude increased extinction of several animal and plant species,rising sea levels, and change in agriculture patterns. Anenthusiastic debate is in advancement of seriousness and extent ofthe rising surface temperatures, effects of future and past warmingon human being, and need for respond to minimize future warming aswell as deal with consequences of global warming. In many debates,the controversy has been on enhanced greenhouse effect that is linkedto increased greenhouse gases concentrations caused by the humanactivity (Johansen, 2009).
Johansen,B. E. (n.d.). The encyclopedia of global warming science andtechnology. Santa Barbara, Calif. [u.a.: Greenwood Press.