nt atmospheric CO2 to be at around 394.49 ppm (concentration as measured in parts per million) for July 2012 (latest data available), 392.59 ppm for July 2011 and 390.49 ppm for July 2010 (Mauna Loa Observatory, 2012, p. 1). Safe level is determined to be at around 350 ppm only and this data set shows ppm has been exceeded. Global temperatures had certainly soared over the last 150-year period, since this coincided with the first use of fossil fuels on a wide scale by man-made machines invented during the Industrial Revolution.
However, data over a longer time frame (going back to 450,000 years) will show us that temperatures are not significantly higher or lower today than it was several millennia ago. This is shown by the graph indicating the carbon dioxide concentrations for the last 450,000 years which shows patterns over the long-term trend (Schlumberger Excellence in Educational Development Incorporated, 2012, p. 1) has not changed very markedly but just a part of the normal cycle. The three main ways by which human interventions (daily human activities) add CO2 by releasing it to the atmosphere are by burning fossil fuels (coal, oil and natural gas), deforestation and cement production (ibid.). Other activities result in additions to atmospheric CO2 like power generation and industrial activities (cement factories, industrial farms, etc.) and increasing urbanization. The end result is that the world is getting warmer as global temperatures continue to rise all over.
The two major ways by which carbon dioxide is removed from the atmospheric system are through living green plants and the actions of oceans. The plants and trees remove the CO2 by using carbon during photosynthesis or the process when light energy from sun is converted into chemical energy, using carbon dioxide as one of the elements (Mauseth, 2009, p. 224) during their growth and food production by turning these into organic compounds. The second sink, the ocean, is when air gets into contact