CO2
CO2 (carbon dioxide) is an inert, odourless, colourless gas naturally present in the atmosphere in limited concentrations (250 to 500 ppm, parts per million). Since the pre-industrial age (first half of the 18th century) CO2 emissions connected with human activities have gradually increased causing an accumulation of this greenhouse and therefore contributing significantly to global warming.
In conditions of natural equilibrium CO2 plays a vital role: without it in the atmosphere the average temperature on Earth would be so much lower than it is now as to make life difficult for humankind on our planet. Once it has been generated in fact, carbon dioxide remains in the atmosphere, contributing to greenhouse effect, that is the phenomenon of natural thermoregulation of temperatures on Earth which is essential for life to exist.
The problem is that human activity, in particular fossil fuels, have changed that original natural equilibrium, causing a significant increase of the concentration of CO2 in the atmosphere (a 50% increase on pre-industrial levels) and consequently driving global warming.
navigating sustainability
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