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The Enhanced Greenhouse Effect
THE
ENHANCED GREENHOUSE EFFECT
TAMPERING WITH THE EARTH’S THERMOSTAT The 21st century will undoubtedly bring many changes and challenges, some of which may surprise us. But, one change is evident already - CLIMATE CHANGE - and responding to it will certainly be challenging for all of society. Our climate has been relatively stable for millennia, providing the opportunity for our species to prosper and flourish. Now we are confronting the reality that human activities have been changing our atmosphere and have altered the balance of Earth’s natural climate system. UPSETTING A DELICATE BALANCE
What are the Greenhouse Gases? Greenhouse Gas Description Atmospheric Lifetime (yrs) - Responsible for about 2/3 of the natural greenhouse effect. Note:
Human Activity is not a direct influence to any significant degree. organism and fermentation (decay). - Burning (combustion) of hydrocarbon based fuels - Deforestation - Biomass burning (agriculture, wood materials, municipal waste etc…) - Industrial processes (aluminum smelting, lime production) geological coal formations + decomposition of of organic matter. CH4 emissions include: - Manure management - Biomass burning - Natural gas delivery systems - Landfills - Coal mining - Enteric fermentation2 action in soil - Application of nitrogen fertilizers - Soil Cultivation - Production of nitric acid and adipic acid and the combustion of fossil fuels and wood - It can also be used as insulating material for high-voltage transformers and circuit breakers aluminium smelting. Note: There are 7 different types of PFCs firefighting agents, aerosols, foam-blowing agents. Note: There are 13 different types of HFCs atmosphere, however, most of the ozone now found at group level is the result of chemical reactions involving pollutants produced by human activities. Ozone exists naturally in the upper atmosphere where it plays an important role in shielding the Earth from the sun’s harmful ultraviolet rays. Note: There are also many natural things that put CO2 into the atmosphere: forest fires, volcanoes, decomposing trees, plants and, gas bubbles from ocean surfaces. |
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