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--- basics:energy_and_ecology:greenhouse_effect_and_climate_protection [2019/02/21 10:05] – cblagojevic
+++ basics:energy_and_ecology:greenhouse_effect_and_climate_protection [2020/08/09 14:32] – [What are the reasons for the increased CO2 levels? Energy Consumption] aktualisiert wfeist
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 |{{:picopen:erde_von_messenger.png?150}}|//**Planet Earth viewed from space (image by NASA):\\ \\ 2007 CO2 concentration: 0,038 %\\ Average surface temperature: 15.5 °C.\\ \\ The blue planet providing ideal\\ conditions for water and biodiversity...**//|\\
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-The Passive House Institute doesn't need to add anymore to the the information already available about climate change. The effects of continuing and unchecked emission of greenhouse gases into the atmosphere can be tremendous and irreversible. Some of these effects are becoming more and more apparent today, for example, melting glaciers.\\
+The Passive House Institute doesn't need to add anymore to the information already available about climate change. The effects of continuing and unchecked emission of greenhouse gases into the atmosphere can be tremendous and irreversible. Some of these effects are becoming more and more apparent today, for example, melting glaciers.\\
 \\
 |{{ :picopen:see_eis_wf.gif }}|//**The northern polar region (image by NASA): a thermometer.\\ \\ The enormous temperature increase over the past decades\\ has caused vast parts of the polar ice to vanish.\\ Glaciers are another long-term indicator for the increase in\\ temperature: To learn more about this phenomenon, please\\ read the following Wikipedia article:\\ [[http://en.wikipedia.org/wiki/Retreat_of_glaciers_since_1850|Retreat of glaciers since 1850]].**//|\\
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 ** Climate change is mainly caused by fossil energy consumption.**\\
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-About 85 % of the worlwide energy consumption today is covered by crude oil, natural gas and coal. These fuels are also known as "fossil energy sources". They consist mainly of the elements carbon and hydrogen; when these fuels are burned, CO<sub>2</sub> and water (H<sub>2</sub>O) are produced.
+About 80 % of the worlwide energy consumption today(2020; 2008 it was still 85%) is covered by crude oil, natural gas and coal. These fuels are also known as "fossil energy sources". They consist mainly of the elements carbon and hydrogen; when these fuels are burned, CO<sub>2</sub> and water (H<sub>2</sub>O) are produced.
 These combustion gases are mostly (over 99%) given off into the atmosphere. The water doesn't cause problems, however; it is the  global CO<sub>2</sub> content of the atmosphere which constantly keeps increasing, significantly and measurably (see the following illustration), due to the continued burning of fossil fuels. That the increase measured in the Atmosphere's CO<sub>2</sub> contend (see the Graph following) is indeed mainly caused by the burning of fossil fuels was independently proven by measurements of the development of the Carbon (C)-isotopes in the air: [[http://www.skepticalscience.com/anthrocarbon-brief.html| See: antgropogenic CO2?]] - Fossil fuels do not contain a large amount of the <sup>14</sup>C-isotope.